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
74900447
Composite: proven not-prime with Lucas-Lehmer test
No factors below 275
TF target 274
P-1
B1 = 625000
B2 = 12656250
LL
StatusDateUserResidueShiftSoftware
Verified2016-05-15George WoltmanC91FC2D592D1260617630468Windows 64-bit,Prime95,v28.9,build 2
Verified2025-01-01Dmitriy DegtiarevC91FC2D592D126064268866Linux 64-bit,Prime95,v30.3,build 6
History
DateUserTypeResult
2025-01-01Dmitriy DegtiarevC-LLC91FC2D592D12606
2016-05-15George WoltmanC-LLC91FC2D592D12606
2016-04-02Mark RoseNFno factor TF: 57-64
2016-01-03Travis Glenn RussoNF-PM1B1=625000, B2=12656250, E=12
2015-12-06TheJudgerNFno factor TF: 74-75
2015-12-06TheJudgerNFno factor TF: 73-74
2015-12-06TheJudgerNFno factor TF: 72-73
2015-08-28Judge HaleNFno factor TF: 71-72
2014-08-09PascalBieriNFno factor TF: 70-71
2012-11-08Clown_RoyalNFno factor TF: 69-70
2010-09-28S00030NFno factor TF: 68-69
2010-09-26seekuaNFno factor TF: 67-68
2010-09-23seekuaNFno factor TF: 66-67
2010-09-17seekuaNFno factor TF: 65-66
2010-09-14NumberwangNFno factor TF: 64-65
2002-04-20JossNFno factor TF: 1-57