Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
40250641
Composite: proven not-prime with Lucas-Lehmer test
No factors below 274
TF target 272
P-1
B1 = 660000
B2 = 660000
LL
StatusDateUserResidueShiftSoftware
Bad2009-08-21-anonymous-A1102E4509A278D332361851Windows,Prime95,v25 beta,(aka Wd1)
Bad2015-06-28XZTFD597442A565724F33159253Windows 64-bit,Prime95,v28.5,build 2
Verified2015-07-05XZT69D8F879CEFFF2B910490441Windows 64-bit,Prime95,v28.5,build 2
Verified2015-07-06XZT69D8F879CEFFF2B919419227Windows 64-bit,Prime95,v28.5,build 2
Verified2015-07-08MadPoo 🙂69D8F879CEFFF2B910300207Windows 64-bit,Prime95,v26,(aka We4)
History
DateUserTypeResult
2020-01-31-anonymous-NFno factor TF: 73-74
2019-09-30-anonymous-NFno factor TF: 72-73
2015-07-08MadPoo 🙂C-LL69D8F879CEFFF2B9
2015-07-06XZTC-LL69D8F879CEFFF2B9
2015-07-05XZTC-LL69D8F879CEFFF2B9
2015-06-28XZTC-LLFD597442A565724F
2015-01-26Mark RoseNFno factor TF: 71-72
2014-12-19NickOfTimeNFno factor TF: 70-71
2014-12-19NickOfTimeNFno factor TF: 69-70
2013-10-21VictordeHollanderNFno factor TF: 68-69
2009-08-21-anonymous-C-LLA1102E4509A278D3
2008-07-04-anonymous-NF-PM1B1=660000
2006-12-18-anonymous-NFno factor TF: 1-68
2006-09-04-anonymous-NFno factor TF: 1-62