Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
7680437
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
120555745968436457141987692683.32020-06-09 00:34:03
P-1 factors
DateFactorsB1B2
2020-06-0912055574596843645714198769
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
Factored1999-08-16Steven CarlsonEA9C45E008194E393332868Windows,Prime95,v18,(aka WU1)
Factored2002-06-02Bradley A. EllisonEA9C45E008194E394936004Windows,Prime95,v21,(aka WX1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2020-06-09LaurV29CD10BD0CA622281260739153
Verified
PRP without proof (not generated)
2020-06-10MarkS29CD10BD0CA622281623245453
History
DateUserTypeResult
2020-06-10MarkSC-PRPM7680437/12055574596843645714198769 : 29CD10BD0CA62228
2020-06-09LaurVC-PRPM7680437/12055574596843645714198769 : 29CD10BD0CA62228
2020-06-09GdSF-PM1Factor: 12055574596843645714198769 / 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
2012-08-04NesowaNF-PM1B1=95000, B2=1757500, E=6
2003-12-13-anonymous-NFno factor TF: 1-63
2002-06-02-anonymous-C-LLEA9C45E008194E39
2002-04-20-anonymous-NF-PM1B1=35000, B2=332500
2001-07-29-anonymous-NFno factor TF: 1-63
2001-06-30-anonymous-NFno factor TF: 1-63
1999-08-16-anonymous-C-LLEA9C45E008194E39
1999-03-01-anonymous-NFno factor TF: 1-63
1999-01-29Nicolas MarmetNFno factor TF: 1-62
1998-08-09-anonymous-NFno factor TF: 1-61