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
40692689
Composite: proven not-prime with Lucas-Lehmer test
No factors below 273
TF target 272
P-1
B1 = 565000
B2 = 11865000
LL
StatusDateUserResidueShiftSoftware
Bad2008-04-25Dick Cummings47A12BC15FC924D923191285Windows,Prime95,v23,(aka WZ1)
Verified2016-08-04endless_mike8E79BF431DCD9CBA36951114Windows 64-bit,Prime95,v28.9,build 2
Verified2016-09-18Mark Rose8E79BF431DCD9CBA22830074Linux 64-bit,Prime95,v28.9,build 2
History
DateUserTypeResult
2022-04-23Sid & AndyNFno factor TF: 72-73
2018-12-30Architects CubedNF-PM1B1=565000, B2=11865000, E=12
2016-09-18Mark RoseC-LL8E79BF431DCD9CBA
2016-08-04endless_mikeC-LL8E79BF431DCD9CBA
2015-05-31TheJudgerNFno factor TF: 71-72
2014-12-22chalsallNFno factor TF: 70-71
2014-12-22chalsallNFno factor TF: 69-70
2008-04-24-anonymous-C-LL47A12BC15FC924D9
2007-10-29-anonymous-NF-PM1B1=605000
2007-02-06subgeniusNFno factor TF: 1-69
2007-02-05subgeniusNFno factor TF: 1-69