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 2007-07-22, 14:22 #2 Cruelty     May 2005 2×809 Posts Software: head to this page and download latest LLR version. In order to start search you have to download gmfcandidates.zip file - it is prefactored till 32 bits. Then, choose your range. Available ranges AFAIK are: - 700000 till GM36 (991961) - some missing GQ might be found - from 1203799 till ~40M (next GM and GQ) Remember to add Code: TestGM=1 TestGQ=1 to your llr.ini - this will allow you looking for both GM and GQ. As for the timings, testing single exponent @ 1.2M takes 2800-2900 seconds on a C2D @ 3GHz, however you should also take into account factoring which unfortunately takes a lot of time right now and you cannot limit it to given value (for current exponents, I would say that 50-51 bits is more than enough, unfortunately it goes till 59 bits AFAIR). The factoring depth really keeps me from continuing GM/GQ search right now. Last fiddled with by Cruelty on 2007-07-22 at 14:53