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

PrimeNet Exponent Status

Exponent Range:





MnDetails
7668613
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
3899786031380260962000472478.42020-05-24 12:31:25
P-1 factors
DateFactorsB1B2
2020-05-24389978603138026096200047
133769832104742
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
Factored1999-10-29Chris Maurice7E393644876A89F74427187Windows,Prime95,v18,(aka WU1)
Bad2002-04-14Ars Technica Team Prime RibE3B4513FA26197C16740355Windows,Prime95,v21,(aka WX1)
Factored2002-09-07Kate Stange7E393644876A89F72836033Windows,Prime95,v19,(aka WV1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2020-05-25MarkS4830F9C495A69CB31566223653
Verified
PRP without proof (not generated)
2020-05-26marssystems4830F9C495A69CB31677530453
History
DateUserTypeResult
2020-05-26marssystemsC-PRPM7668613/389978603138026096200047 : 4830F9C495A69CB3
2020-05-25MarkSC-PRPM7668613/389978603138026096200047 : 4830F9C495A69CB3
2020-05-24GdSF-PM1Factor: 389978603138026096200047 / B1=1337698, B2=32104742
2020-03-20TJAOINFno 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
2013-12-07David CampeauNFno factor TF: 64-65
2013-10-11NesowaNFno factor TF: 63-64
2012-08-02NesowaNF-PM1B1=95000, B2=1757500, E=6
2002-09-07-anonymous-C-LL7E393644876A89F7
2002-04-14Team Prime RibC-LLE3B4513FA26197C1
2002-04-14Team Prime RibNF-PM1B1=40000, B2=650000
1999-11-04-anonymous-C-LL7E393644876A89F7
1999-10-29-anonymous-C-LL7E393644876A89F7
1998-12-21-anonymous-NFno factor TF: 1-63
1998-07-29-anonymous-NFno factor TF: 1-62