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

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MnDetails
7665527
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
5749413754626589538698938972788.92020-05-25 01:07:33
P-1 factors
DateFactorsB1B2
2020-05-25574941375462658953869893897
133769832104742
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
Factored1999-09-22Mischa Kenn66CF8763F7A1098D5919341Windows,Prime95,v18,NT service,(aka WU5)
Factored1999-10-07Zsolt FAZEKAS66CF8763F7A1098D1533667Windows,Prime95,v18,(aka WU1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2020-05-25Klaus Nordmann011E96EDB7F14B5A1236813253
Verified
PRP without proof (not generated)
2020-05-27Luigi Morelli011E96EDB7F14B5A1650932753
History
DateUserTypeResult
2020-05-27Luigi MorelliC-PRPM7665527/574941375462658953869893897 : 011E96EDB7F14B5A
2020-05-25Klaus NordmannC-PRPM7665527/574941375462658953869893897 : 011E96EDB7F14B5A
2020-05-25GdSF-PM1Factor: 574941375462658953869893897 / B1=1337698, B2=32104742
2020-03-20TJAOINFno factor TF: 68-69
2018-07-31ramgeisNFno factor TF: 67-68
2016-09-19Gordon SpenceNFno factor TF: 66-67
2015-06-12VictordeHollanderNFno factor TF: 65-66
2013-12-07David CampeauNFno factor TF: 64-65
2013-10-11NesowaNFno factor TF: 63-64
2012-09-17NesowaNF-PM1B1=95000, B2=1757500, E=6
2009-07-23Carsten KossendeyNF-PM1B1=45000, B2=686250, E=6
1999-10-07-anonymous-C-LL66CF8763F7A1098D
1999-09-22Michael KennC-LL66CF8763F7A1098D
1999-03-01-anonymous-NFno factor TF: 1-63
1998-07-29-anonymous-NFno factor TF: 1-62