Prime95 , also distributed as the command-line utility mprime for FreeBSD and Linux , is a freeware application written by George Woltman . It is the official client of the Great Internet Mersenne Prime Search (GIMPS), a volunteer computing project dedicated to searching for Mersenne primes . It is also used in overclocking to test for system stability.
67-615: Although most of its source code is available , Prime95 is not free and open-source software because its end-user license agreement states that if the software is used to find a prime qualifying for a bounty offered by the Electronic Frontier Foundation , then that bounty will be claimed and distributed by GIMPS. Prime95 tests numbers for primality using the Fermat primality test (referred to internally as PRP, or "probable prime"). For much of its history, it used
134-406: A Pathways to Enable Open-Source Ecosystems (POSE) program to support open source innovation. The adoption of open-source software by industry is increasing over time. OSS is popular in several industries such as telecommunications , aerospace , healthcare , and media & entertainment due to the benefits it provides. Adoption of OSS is more likely in larger organizations and is dependent on
201-544: A bug needs to be fixed in their project. This is established by communicating with the OSS community through avenues such as bug reporting and tracking or mailing lists and project pages. Next, OSS developers select or are assigned to a task and identify a solution. Because there are often many different possible routes for solutions in OSS, the best solution must be chosen with careful consideration and sometimes even peer feedback . The developer then begins to develop and commit
268-517: A copy of the license is provided to recipients with the code. One important legal precedent for open-source software was created in 2008, when the Jacobson v Katzer case enforced terms of the Artistic license , including attribution and identification of modifications. The ruling of this case cemented enforcement under copyright law when the conditions of the license were not followed. Because of
335-454: A new bug. Early releases : The first version of the software should be released as early as possible so as to increase one's chances of finding co-developers early. Frequent integration: Code changes should be integrated (merged into a shared code base) as often as possible so as to avoid the overhead of fixing a large number of bugs at the end of the project life cycle. Some open-source projects have nightly builds where integration
402-508: A public good as it is available to everyone and does not decrease in value for others when downloaded by one person. Open source software is unique in that it becomes more valuable as it is used and contributed to, instead of diminishing the resource. This is explained by concepts such as investment in reputation and network effects . The economic model of open-source software can be explained as developers contribute work to projects, creating public benefits. Developers choose projects based on
469-447: A similar way user scripts and custom style sheets allow for web sites, and eventually publish the modification as a fork for users with similar preferences, and directly submit possible improvements as pull requests . The Open Source Initiative 's (OSI) definition is recognized by several governments internationally as the standard or de facto definition. OSI uses The Open Source Definition to determine whether it considers
536-615: A software license open source. The definition was based on the Debian Free Software Guidelines , written and adapted primarily by Perens . Perens did not base his writing on the "four freedoms" from the Free Software Foundation (FSF), which were only widely available later. Under Perens' definition, open source is a broad software license that makes source code available to the general public with relaxed or non-existent restrictions on
603-422: A victory for OSS supporters. In open-source communities, instead of owning the software produced, the producer owns the development of the evolving software. In this way, the future of the software is open, making ownership or intellectual property difficult within OSS. Licensing and branding can prevent others from stealing it, preserving its status as a public good . Open source software can be considered
670-443: Is computer software that is released under a license in which the copyright holder grants users the rights to use, study, change, and distribute the software and its source code to anyone and for any purpose. Open-source software may be developed in a collaborative, public manner. Open-source software is a prominent example of open collaboration , meaning any capable user is able to participate online in development, making
737-442: Is source-available in the broad sense as long as its source code is distributed along with it, even if the user has no legal rights to use, share, modify or even compile it. It is possible for a software to be both source-available software and proprietary software (e.g. id Software 's Doom ). In contrast, the definitions of free software and open-source software are much narrower. Free software and/or open-source software
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#1732772928740804-486: Is a source-available license. In the narrow sense, the term source-available specifically excludes FOSS software. The following source-available software licenses are considered non-free licenses because they have limitations that prevent them from being open-source according to the Open Source Initiative and free to the Free Software Foundation . The Commons Clause, created by Fossa, Inc.,
871-404: Is a good or service, what can be considered a modification, governance through contract vs license, ownership and right of use. While there have been developments on these issues, they often lead to even more questions. The existence of these uncertainties in regulation has a negative impact on industries involved in technologies as a whole. Within the legal history of software as a whole, there
938-564: Is a modification of the GNU Affero General Public License created by the MongoDB project. It modifies a clause relating to usage of the licensed work over a network, stating that if SSPL-licensed software is incorporated into a "service" offered to other users, the source code for the entirety of the service (including without limitation all software and APIs that would be required for a user to run an instance of
1005-556: Is absolutely another terrific way that individuals and organizations choose to contribute to open source projects. Groups like Open Collective provide a means for individuals to contribute monthly to supporting their favorite projects. Organizations like the Sovereign Tech Fund is able to contribute to millions to supporting the tools the German Government uses. The National Science Foundation established
1072-426: Is also always source-available software , but not all source-available software is also free software and/or open-source software. This is because the official definitions of those terms require considerable additional rights as to what the user can do with the available source (including, typically, the right to use said software, with attribution, in derived commercial products). In the broad sense, any FOSS license
1139-627: Is an addendum to an open-source software license that restricts users from selling the software. Under the combined license, the software is source-available, but not open-source. On August 22, 2018, Redis Labs shifted some Redis Modules from the GNU Affero General Public License to a combination of the Apache License 2.0 and the Commons Clause. In September 2018, Matthew Garrett criticized Commons Clause calling it an "older way of doing things" and said it "doesn't help
1206-544: Is done automatically . Several versions: There should be at least two versions of the software. There should be a buggier version with more features and a more stable version with fewer features. The buggy version (also called the development version) is for users who want the immediate use of the latest features and are willing to accept the risk of using code that is not yet thoroughly tested. The users can then act as co-developers, reporting bugs and providing bug fixes. High modularization: The general structure of
1273-521: Is implemented, but Prime95 is rarely used for that work in practice because it can be done much more efficiently using a GPU , due to the type of arithmetic involved. Finally, the elliptic-curve factorization method and Williams's p + 1 algorithm are implemented, but are considered not useful at modern GIMPS testing levels and mostly used in attempts to factor much smaller Mersenne numbers that have already undergone primality testing. GIMPS has discovered 18 new Mersenne primes since its foundation in 1996,
1340-404: Is innovative since open-source programs are the product of collaboration among a large number of different programmers. The mix of divergent perspectives, corporate objectives, and personal goals speeds up innovation. Moreover, free software can be developed in accordance with purely technical requirements. It does not require thinking about commercial pressure that often degrades the quality of
1407-560: Is legal variety in this definition. Some jurisdictions attempt to expand or reduce this conceptualization for their own purposes. For example, The European Court of Justice defines a computer program as not including the functionality of a program, the programing language , or the format of data files. By limiting protections of the different aspects of software, the law favors an open-source approach to software use. The US especially has an open approach to software, with most open-source licenses originating there. However, this has increased
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#17327729287401474-468: Is theoretically challenging in economic models, it is explainable as a sustainable social activity that requires resources. These resources include time, money, technology and contributions. Many developers have used technology funded by organizations such as universities and governments, though these same organizations benefit from the work done by OSS. As OSS grows, hybrid systems containing OSS and proprietary systems are becoming more common. Throughout
1541-546: The Apache License , but retained the TrueCrypt License for code inherited from TrueCrypt. The Open Source Initiative rejects the TrueCrypt License, as "it has elements incompatible with the OSD ." The Free Software Foundation criticizes the license for restricting who can execute the program, and for enforcing a trademark condition. BeeGFS EULA is the license of the distributed parallel file system BeeGFS, except
1608-568: The Lucas–Lehmer primality test , but the availability of Lucas–Lehmer assignments was deprecated in April 2021 to increase search throughput. Specifically, to guard against faulty results, every Lucas–Lehmer test had to be performed twice in its entirety, while Fermat tests can be verified in a small fraction of their original run time using a proof generated during the test by Prime95. Current versions of Prime95 remain capable of Lucas–Lehmer testing for
1675-861: The MIT License . This makes GitLab an example of an open core company. In 2016, Mega Ltd. released the source code of their Mega clients under the Mega Limited Code Review Licence, which only permits usage of the code "for the purposes of review and commentary". The source code was released after former director Kim Dotcom stated that he would "create a Mega competitor that is completely open source and non-profit" following his departure from Mega Ltd. Microsoft's Shared Source Initiative , launched in May 2001, comprises 5 licenses, 2 of which are open-source and 3 of which are restricted. The restricted licenses under this scheme are
1742-491: The commons ". Business Source License has been introduced by MariaDB Corporation in 2016 and rapidly became one of the most adopted "delayed open source" licenses. It prohibits use of the code in production environments, where a commercial license is required. Functional Source License has been introduced in November 2023 by Sentry, as a simpler alternative to Business Source License. It prohibits any "competing" use of
1809-889: The distributed version control system (DVCS) are examples of tools, often open source, that help manage the source code files and the changes to those files for a software project in order to foster collaboration. CVCS are centralized with a central repository while DVCS are decentralized and have a local repository for every user. concurrent versions system (CVS) and later Subversion (SVN) and Git are examples of CVCS. The repositories are hosted and published on source-code-hosting facilities such as GitHub . Open-source projects use utilities such as issue trackers to organize open-source software development. Commonly used bug trackers include Bugzilla and Redmine . Tools such as mailing lists and IRC provide means of coordination and discussion of bugs among developers. Project web pages, wiki pages, roadmap lists and newsgroups allow for
1876-462: The Bazaar , open-source influential contributor Eric S. Raymond suggests a model for developing OSS known as the bazaar model. Raymond likens the development of software by traditional methodologies to building a cathedral, with careful isolated work by individuals or small groups. He suggests that all software should be developed using the bazaar style, with differing agendas and approaches. In
1943-776: The Microsoft Limited Public License (Ms-LPL), the Microsoft Limited Reciprocal License (Ms-LRL), and the Microsoft Reference Source License (Ms-RSL). Prior to version 5, Scilab described itself as "the open source platform for numerical computation " but had a license that forbade commercial redistribution of modified versions. Versions 5 and later are distributed under the GPL -compatible CeCILL license. The Server Side Public License
2010-641: The Public Interest . Within Europe some notable organizations are Free Software Foundation Europe , open-source projects EU (OSP) and OpenForum Europe (OFE). One Australian organization is Linux Australia while Asia has Open source Asia and FOSSAsia . Free and open source software for Africa (FOSSFA) and OpenAfrica are African organizations and Central and South Asia has such organizations as FLISOL and GRUP de usuarios de software libre Peru . Outside of these, many more organizations dedicated to
2077-582: The United States has focused on national security in regard to open-source software implementation due to the perceived threat of the increase of open-source software activity in countries like China and Russia, with the Department of Defense considering multiple criteria for using OSS. These criteria include: if it comes from and is maintained by trusted sources, whether it will continue to be maintained, if there are dependencies on sub-components in
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2144-473: The advancement of open-source software exist. FOSS products are generally licensed under two types of licenses: permissive licensing and copyleft licensing . Both of these types of licenses are different than proprietary licensing in that they can allow more users access to the software and allow for the creation of derivative works as specified by the terms of the specific license, as each license has its own rules. Permissive licenses allow recipients of
2211-402: The bazaar model should exhibit the following patterns: Users should be treated as co-developers: The users are treated like co-developers and so they should have access to the source code of the software. Furthermore, users are encouraged to submit additions to the software, code fixes for the software, bug reports , documentation, etc. Having more co-developers increases the rate at which
2278-461: The client for Linux, which is licensed under GPLv2 . BeeGFS source code is publicly available from their website, and because of this they claiming BeeGFS as "Open-Source" software; it is in fact not because this license prohibits distributing modified versions of the software, or using certain features of the software without authorization. Open-source software This is an accepted version of this page Open-source software ( OSS )
2345-545: The code, to preserve the rights of the author to economically exploit it, but applies for a limited time, after which the code itself is considered to be available under Apache License or MIT License . The GitLab Enterprise Edition License is used exclusively by GitLab 's commercial offering. GitLab Inc. openly discloses that the EE License makes their Enterprise Edition product "proprietary, closed source code." GitLab also releases an open-source Community Edition under
2412-414: The code. The code is then tested and reviewed by peers. Developers can edit and evolve their code through feedback from continuous integration . Once the leadership and community are satisfied with the whole project, it can be partially released and user instruction can be documented. If the project is ready to be released, it is frozen, with only serious bug fixes or security repairs occurring. Finally,
2479-427: The company's IT usage, operating efficiencies, and the productivity of employees. Industries are likely to use OSS due to back-office functionality, sales support, research and development, software features, quick deployment, portability across platforms and avoidance of commercial license management. Additionally, lower cost for hardware and ownership are also important benefits. Organizations that contribute to
2546-403: The development and expansions of free and open-source software movements exist all over the world. These organizations are dedicated to goals such as teaching and spreading technology. As listed by a former vice president of the Open Source Initiative , some American organizations include the Free Software Foundation , Software Freedom Conservancy , the Open Source Initiative and Software in
2613-461: The distribution of project information that focuses on end users. The basic roles OSS participants can fall into multiple categories, beginning with leadership at the center of the project who have control over its execution. Next are the core contributors with a great deal of experience and authority in the project who may guide the other contributors. Non-core contributors have less experience and authority, but regularly contribute and are vital to
2680-492: The first 17 of which using Prime95. The 18th and most recent, M 136279841 , was discovered in October 2024 using an Nvidia GPU, being the first GIMPS discovery to not have used Prime95 and its CPU computation. 15 of the 17 primes discovered with Prime95 were the largest known prime number at the time of their respective discoveries, the exceptions being M 37156667 and M 42643801 , which were discovered out of order from
2747-601: The focus on patent rights within these licenses, which has seen backlash from the OSS community, who prefer other forms of IP protection. Another issue includes technological protection measures (TPM) and digital rights management (DRM) techniques which were internationally legally recognized and protected in the 1996 World Intellectual Property Organization (WIPO) Treaty . Open source software proponents disliked these technologies as they constrained end-users potentially beyond copyright law. Europe responded to such complaints by putting TPM under legal controls, representing
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2814-427: The larger M 43112609 . To maximize search throughput, most of Prime95 is written in hand-tuned assembly , which makes its system resource usage much greater than most other computer programs. Additionally, due to the high precision requirements of primality testing, the program is very sensitive to computation errors and proactively reports them. These factors make it a commonly used tool among overclockers to check
2881-480: The many benefits provided, a huge issue to be considered is cybersecurity . While accidental vulnerabilities are possible, so are attacks by outside agents. Because of these fears, governmental interest in contributing to the governance of software has become more prominent. However, these are the broad strokes of the issue, with each country having their own specific politicized interactions with open-source software and their goals for its implementation. For example,
2948-560: The mid 2000s, more and more tech companies have begun to use OSS. For example, Dell's move of selling computers with GNU/Linux already installed. Microsoft itself has launched a Linux-based operating system despite previous animosity with the OSS movement. Despite these developments, these companies tend to only use OSS for certain purposes, leading to worries that OSS is being taken advantage of by corporations and not given anything in return. While many governments are interested in implementing and promoting open-source software due to
3015-508: The number of people employed in the IT sector. OSS can be highly reliable when it has thousands of independent programmers testing and fixing bugs of the software. Open source is not dependent on the company or author that originally created it. Even if the company fails, the code continues to exist and be developed by its users. OSS is flexible because modular systems allow programmers to build custom interfaces, or add new abilities to it and it
3082-537: The number of possible contributors indefinite. The ability to examine the code facilitates public trust in the software. Open-source software development can bring in diverse perspectives beyond those of a single company. A 2024 estimate of the value of open-source software to firms is $ 8.8 trillion, as firms would need to spend 3.5 times the amount they currently do without the use of open source software. Open-source code can be used for studying and allows capable end users to adapt software to their personal needs in
3149-435: The perceived benefits or costs, such as improved reputation or value of the project. The motivations of developers can come from many different places and reasons, but the important takeaway is that money is not the only or even most important incentivization . Because economic theory mainly focuses on the consumption of scarce resources, the OSS dynamic can be hard to understand. In OSS, producers become consumers by reaping
3216-404: The potential to quicken innovation and create of social value. In France for instance, a policy that incentivized government to favor free open-source software increased to nearly 600,000 OSS contributions per year, generating social value by increasing the quantity and quality of open-source software. This policy also led to an estimated increase of up to 18% of tech startups and a 14% increase in
3283-574: The project is fully released and only changed through minor bug fixes. Open source implementation of a standard can increase adoption of that standard. This creates developer loyalty as developers feel empowered and have a sense of ownership of the end product. Moreover, lower costs of marketing and logistical services are needed for OSS. OSS can be a tool to promote a company's image, including its commercial products. The OSS development approach has helped produce reliable, high quality software quickly and inexpensively. Open source development offers
3350-759: The project's development. New contributors are the least experienced but with mentorship and guidance can become regular contributors. Some possible ways of contributing to open-source software include such roles as programming , user interface design and testing, web design , bug triage , accessibility design and testing, UX design , code testing, and security review and testing. However, there are several ways of contributing to OSS projects even without coding skills. For example, some less technical ways of participating are documentation writing and editing, translation , project management , event organization and coordination, marketing, release management, community management, and public relations and outreach. Funding
3417-446: The purpose of double-checking existing Lucas–Lehmer results, and for fully verifying "probably prime" Fermat test results (which, unlike "prime" Lucas–Lehmer results, are not conclusive). To reduce the number of full-length primality tests needed, Prime95 first checks numbers for trivial compositeness by attempting to find a small factor . As of 2024, test candidates are mainly filtered using Pollard's p – 1 algorithm . Trial division
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#17327729287403484-431: The rewards of contributing to a project. For example, a developer becomes well regarded by their peers for a successful contribution to an OSS project. The social benefits and interactions of OSS are difficult to account for in economic models as well. Furthermore, the innovation of technology creates constantly changing value discussions and outlooks, making economic model unable to predict social behavior. Although OSS
3551-496: The same license while weak copyleft licenses require the use of the same license only under certain conditions. Examples of this type of license include the GNU family of licenses , and the MPL and EPL licenses. The similarities between these two categories of licensing include that they provide a broad grant of copyright rights, require that recipients preserve copyright notices, and that
3618-514: The service themselves) must be released under the SSPL. The license is considered non-free by the Open Source Initiative , Debian and Red Hat , as it contains conditions that are unduly discriminatory towards commercial use of the software. In 2007 Michael Tiemann , president of OSI, had criticized companies such as SugarCRM for promoting their software as "open source" when in fact it did not have an OSI-approved license. In SugarCRM's case, it
3685-500: The similarity of the Artistic license to other open-source software licenses, the ruling created a precedent that applied widely. Examples of free-software license / open-source licenses include Apache licenses , BSD licenses , GNU General Public Licenses , GNU Lesser General Public License , MIT License , Eclipse Public License and Mozilla Public License . Several gray areas exist within software regulation that have great impact on open-source software, such as if software
3752-488: The software "in any manner they see fit, without requiring that they pay the author(s) of the software a royalty or fee for engaging in the listed activities." Despite initially accepting it, Richard Stallman of the FSF now flatly opposes the term "Open Source" being applied to what they refer to as "free software". Although he agrees that the two terms describe "almost the same category of software", Stallman considers equating
3819-401: The software evolves. Linus's law states that given enough eyeballs all bugs are shallow. This means that if many users view the source code, they will eventually find all bugs and suggest how to fix them. Some users have advanced programming skills, and furthermore, each user's machine provides an additional testing environment. This new testing environment offers the ability to find and fix
3886-484: The software should be modular allowing for parallel development on independent components. Dynamic decision-making structure: There is a need for a decision-making structure, whether formal or informal, that makes strategic decisions depending on changing user requirements and other factors. Compare with extreme programming . The process of Open source development begins with a requirements elicitation where developers consider if they should add new features or if
3953-456: The software to implement the author's copyright rights without having to use the same license for distribution. Examples of this type of license include the BSD , MIT , and Apache licenses . Copyleft licenses are different in that they require recipients to use the same license for at least some parts of the distribution of their works. Strong copyleft licenses require all derivative works to use
4020-568: The software, component security and integrity, and foreign governmental influence. Another issue for governments in regard to open source is their investments in technologies such as operating systems , semiconductors , cloud , and artificial intelligence . These technologies all have implications for global cooperation, again opening up security issues and political consequences. Many countries have to balance technological innovation with technological dependence in these partnerships. For example, after China's open-source dependent company Huawei
4087-425: The software. Commercial pressures make traditional software developers pay more attention to customers' requirements than to security requirements, since such features are somewhat invisible to the customer. In open-source software development, tools are used to support the development of the product and the development process itself. Version control systems such as Centralized Version control system (CVCS) and
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#17327729287404154-549: The stability of a particular configuration. Source-available software Source-available software is software released through a source code distribution model that includes arrangements where the source can be viewed, and in some cases modified, but without necessarily meeting the criteria to be called open-source . The licenses associated with the offerings range from allowing code to be viewed for reference to allowing code to be modified and redistributed for both commercial and non-commercial purposes. Any software
4221-597: The terms incorrect and misleading. Stallman also opposes the professed pragmatism of the Open Source Initiative , as he fears that the free software ideals of freedom and community are threatened by compromising on the FSF's idealistic standards for software freedom. The FSF considers free software to be a subset of open-source software, and Richard Stallman explained that DRM software, for example, can be developed as open source, despite that it does not give its users freedom (it restricts them), and thus does not qualify as free software. In his 1997 essay The Cathedral and
4288-514: The traditional model of development, which he called the cathedral model, development takes place in a centralized way. Roles are clearly defined. Roles include people dedicated to designing (the architects), people responsible for managing the project, and people responsible for implementation. Traditional software engineering follows the cathedral model. The bazaar model, however, is different. In this model, roles are not clearly defined. Some proposed characteristics of software developed using
4355-437: The use and modification of the code. It is an explicit "feature" of open source that it puts very few restrictions on the use or distribution by any organization or user, in order to enable the rapid evolution of the software. According to Feller et al. (2005), the terms "free software" and "open-source software" should be applied to any "software products distributed under terms that allow users" to use, modify, and redistribute
4422-633: Was because the software is so-called " badgeware " since it specified a "badge" that must be displayed in the user interface. SugarCRM's open source version was re-licensed under the GPL version 3 in 2007, and later the GNU Affero GPL version 3 in 2010. The TrueCrypt License was used by the TrueCrypt disk encryption utility . When TrueCrypt was discontinued, the VeraCrypt fork switched to
4489-404: Was much debate on whether to protect it as intellectual property under patent law , copyright law or establishing a unique regulation. Ultimately, copyright law became the standard with computer programs being considered a form of literary work, with some tweaks of unique regulation. Software is generally considered source code and object code , with both being protectable, though there
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