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Prime95 is the freeware application written by George Woltman that is used by GIMPS, a distributed computing project dedicated to finding new Mersenne prime numbers. More specifically, Prime95 refers to the Windows and Mac OS X versions of the software. MPrime is the Linux command-line interface version of Prime95, to be run in a text terminal or in a terminal emulator window as a remote shell client. It is identical to Prime95 in functionality, except it lacks a graphical user interface. Although most of the GIMPS software's source code is publicly available, it is technically not free software as users must abide by the project's distribution (terms ) if the software is used to discover a prime number with at least 100,000,000 decimal digits and wins the $150,000 bounty offered by the EFF.〔(Cooperative Computing Awards )〕 As such, a user who uses Prime95 to discover a qualifying prime number would not be able to claim the prize directly ($50,000 will go to the person who finds the prime number). A free software package would not have this restriction. The code that is used to generate checksums is not publicly available due to security reasons.〔http://mersenneforum.org/showpost.php?p=47191&postcount=16〕 The rewritten FFT assembly code in the current stable version 28 (since June 1, 2014) uses FMA instruction set (FMA3) instructions of Haswell (microarchitecture) CPUs (Core i3/i5/i7-4xxx models), resulting in a huge performance increase.〔(【引用サイトリンク】url=http://www.mersenne.org/ )〕 Prime95 currently does not have GPU support, although Woltman has indicated that it is under development. However, there are third-party programs, such as CUDALucas, that make use of the processing power of GPUs. ==Finding Mersenne primes by distributed computing== , 14 new Mersenne prime numbers have been found by the network of participants, and a new Mersenne prime was discovered approximately every year until 2009; the latest was four years later. Scott Kurowski wrote the (Internet PrimeNet ) Server that supports the Prime95/MPrime software on GIMPS, one of the earliest grid computing projects, researching Mersenne prime numbers, to demonstrate Entropia-distributed computing software, a company he founded in 1997. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Prime95」の詳細全文を読む スポンサード リンク
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