Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnDetails
7675471
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
64077286638577491431512272.42020-06-09 00:34:02
P-1 factors
DateFactorsB1B2
2020-06-096407728663857749143151
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 NovareseDBA6A21D08DB6E670Mlucas,Ernst Mayer,v2.5 and later,(aka E2)
Factored2000-03-28Charles PriceDBA6A21D08DB6E675187680Windows,Prime95,v19,(aka WV1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2020-06-11fre_gamesE29440A8423DEE8C1454968153
Verified
PRP without proof (not generated)
2020-06-13oodairaE29440A8423DEE8C1639540153
History
DateUserTypeResult
2020-06-13oodairaC-PRPM7675471/6407728663857749143151 : E29440A8423DEE8C
2020-06-11fre_gamesC-PRPM7675471/6407728663857749143151 : E29440A8423DEE8C
2020-06-09GdSF-PM1Factor: 6407728663857749143151 / 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
2012-09-17NesowaNF-PM1B1=95000, B2=1757500, E=6
2009-08-09Carsten KossendeyNF-PM1B1=45000, B2=686250, E=6
2000-03-28-anonymous-C-LLDBA6A21D08DB6E67
1998-08-30-anonymous-NFno factor TF: 1-63
1998-08-16-anonymous-NFno factor TF: 1-62