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

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MnDetails
7763923
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 267
Factored
FactorDigitsBitsDate
55203515953053324731962.32016-03-08 18:41:31
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
Factored1999-10-15Doug Wiltse834114D738B9B9145672629Windows,Prime95,v18,(aka WU1)
Factored2002-06-15Christian Meyer834114D738B9B914468515Windows,Prime95,v21,(aka WX1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2018-05-08Oliver Kruse4C758471D8E908451740852253
Verified
PRP without proof (not generated)
2019-09-29Chang Chia-Tche4C758471D8E908451393914553
History
DateUserTypeResult
2025-05-08Stef42NF-PM1B1=1050000, B2=1457519700
2019-09-29Chang Chia-TcheC-PRP
M7763923/5520351595305332473 : 4C758471D8E90845
2018-05-08Oliver KruseC-PRP
M7763923/5520351595305332473 : 4C758471D8E90845
2016-03-08TJAOIFFactor: 5520351595305332473
2015-06-03VictordeHollanderNFno factor TF: 65-66
2013-12-12David CampeauNFno factor TF: 64-65
2013-10-08NesowaNFno factor TF: 63-64
2012-08-24NesowaNF-PM1B1=95000, B2=1781250, E=6
2003-10-08-anonymous-C-LL834114D738B9B914
2003-10-08-anonymous-NF-PM1B1=35000, B2=288750
2002-06-15-anonymous-C-LL834114D738B9B914
2002-05-05-anonymous-NF-PM1B1=35000, B2=288750
1999-10-15dawiltsC-LL834114D738B9B914
1998-11-28-anonymous-NFno factor TF: 1-63
1998-08-09-anonymous-NFno factor TF: 1-63