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

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MnDetails
7693837
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
192511786897991325906252172684.02020-06-06 13:17:54
P-1 factors
DateFactorsB1B2
2020-06-0619251178689799132590625217
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
Factored1999-09-07Robert Lum3B084423092809581511492Windows,Prime95,v18,(aka WU1)
Factored2002-04-20George Woltman3B084423092809586682613Windows,Prime95,v21,(aka WX1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2020-06-09Luigi Morelli38BD2DA95D7F2B511647015353
Verified
PRP without proof (not generated)
2020-06-10marssystems38BD2DA95D7F2B511169658153
History
DateUserTypeResult
2020-06-10marssystemsC-PRPM7693837/19251178689799132590625217 : 38BD2DA95D7F2B51
2020-06-09Luigi MorelliC-PRPM7693837/19251178689799132590625217 : 38BD2DA95D7F2B51
2020-06-06GdSF-PM1Factor: 19251178689799132590625217 / B1=721165, B2=15144458
2020-03-06TJAOINFno 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
2013-12-10David CampeauNFno factor TF: 64-65
2013-10-12NesowaNFno factor TF: 63-64
2012-08-07NesowaNF-PM1B1=95000, B2=1757500, E=6
2002-04-20George WoltmanC-LL3B08442309280958
2002-03-31George WoltmanNF-PM1B1=35000, B2=271250
1999-09-07-anonymous-C-LL3B08442309280958
1998-12-21-anonymous-NFno factor TF: 1-63
1998-09-06-anonymous-NFno factor TF: 1-62
1998-07-29-anonymous-NFno factor TF: 1-61