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

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MnDetails
7678927
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
7128074636449842056203372479.22020-06-06 13:17:53
P-1 factors
DateFactorsB1B2
2020-06-06712807463644984205620337
72116515144458
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
FactoredPaul Victor Novarese3AFE0A4BED70B53A0Mlucas,Ernst Mayer,v2.5 and later,(aka E2)
Factored1999-08-31Mike Gehrman3AFE0A4BED70B53A4973449Windows,Prime95,v18,NT service,(aka WU5)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2020-06-07Oliver Kruse533620919DFBF7E11187213153
Verified
PRP without proof (not generated)
2020-06-09Luigi Morelli533620919DFBF7E11349377953
History
DateUserTypeResult
2020-06-09Luigi MorelliC-PRPM7678927/712807463644984205620337 : 533620919DFBF7E1
2020-06-07Oliver KruseC-PRPM7678927/712807463644984205620337 : 533620919DFBF7E1
2020-06-06GdSF-PM1Factor: 712807463644984205620337 / B1=721165, B2=15144458
2020-03-13TJAOINFno 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
2013-12-09David CampeauNFno factor TF: 64-65
2013-10-11NesowaNFno factor TF: 63-64
2012-09-18NesowaNF-PM1B1=95000, B2=1757500, E=6
2009-08-05Carsten KossendeyNF-PM1B1=45000, B2=686250, E=6
1999-08-31-anonymous-C-LL3AFE0A4BED70B53A
1998-12-06-anonymous-NFno factor TF: 1-62
1998-11-14-anonymous-NFno factor TF: 1-63
1998-10-25-anonymous-NFno factor TF: 1-62
1998-10-18-anonymous-NFno factor TF: 1-62
1998-09-20-anonymous-NFno factor TF: 1-62
1998-08-30-anonymous-NFno factor TF: 1-62
1998-08-24-anonymous-NFno factor TF: 1-62
1998-08-09-anonymous-NFno factor TF: 1-62
1998-07-29-anonymous-NFno factor TF: 1-62