OpenPFGW, formerly called PrimeForm, is an open source primality testingMathworldPlanetmath program on the Intel platform that has found many of the large primes listed in the Prime Pages. It uses sieve methods, pseudorandom permutation (PRP) as well as methods for specific kinds of primes, as programmed by George Woltman for GIMPS. As of 2006, the largest prime it has found is 19×22206266+1.

According to the Prime Pages, the official website is Yahoo! Group.

Title OpenPFGW
Canonical name OpenPFGW
Date of creation 2013-03-22 16:36:59
Last modified on 2013-03-22 16:36:59
Owner PrimeFan (13766)
Last modified by PrimeFan (13766)
Numerical id 7
Author PrimeFan (13766)
Entry type Topic
Classification msc 68-04
Synonym PrimeForm