Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnDetails
6494069
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 266
Factored
FactorDigitsBitsDate
1802263148949869140092167.32018-05-23 10:48:30
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
Factored1999-08-16Takahiro Shakushi61EED9FE3C7955180Windows,Prime95,v16,NT service,(aka WS5)
Factored2001-03-17chris clark61EED9FE3C795518542803Linux 32-bit,Prime95,v20,(aka WW2)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2018-05-24storm55105E193E25156272461479794653
Verified
PRP without proof (not generated)
2018-09-29rucio5E193E25156272461227812853
History
DateUserTypeResult
2025-01-16Stef42NF-PM1B1=2171000, B2=5069197980
2018-09-29rucioC-PRPM6494069/180226314894986914009 : 5E193E2515627246
2018-05-24storm5510C-PRPM6494069/180226314894986914009 : 5E193E2515627246
2018-05-23ramgeisFFactor: 180226314894986914009 / TF: 67-68*
2016-04-17Gordon SpenceNFno factor TF: 66-67
2016-02-23Mark RoseNFno factor TF: 62-63
2015-10-27snme2pm1NFno factor TF: 65-66
2014-09-02NesowaNF-PM1B1=400000, B2=10100000, E=12
2014-08-12lycornNFno factor TF: 64-65
2014-08-02NesowaNFno factor TF: 63-64
2001-03-17-anonymous-C-LL61EED9FE3C795518
2001-02-25-anonymous-NF-PM1B1=30000, B2=247500
1999-08-16-anonymous-C-LL61EED9FE3C795518
1999-02-07-anonymous-C-LL08C8F798569C8C__
1998-07-05-anonymous-NFno factor TF: 1-62