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

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MnDetails
7606849
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
133091528375152250907912373.52020-05-04 09:42:00
P-1 factors
DateFactorsB1B2
2020-05-0413309152837515225090791
100000020000000
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
Factored1999-07-26Gregory MosherC9E0BABFC6832DDA3688367Windows,Prime95,v18,(aka WU1)
Factored2002-07-20Thomas GreenhalghC9E0BABFC6832DDA3139046Windows,Prime95,v21,(aka WX1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2020-05-05Klaus Nordmann3280AA0E8DC3742F1648509353
Verified
PRP without proof (not generated)
2020-05-05ATH3280AA0E8DC3742F1734626353
History
DateUserTypeResult
2020-05-05ATHC-PRPM7606849/13309152837515225090791 : 3280AA0E8DC3742F
2020-05-05Klaus NordmannC-PRPM7606849/13309152837515225090791 : 3280AA0E8DC3742F
2020-05-04ThaF-PM1Factor: 13309152837515225090791 / B1=1000000, B2=20000000
2020-03-20TJAOINFno factor TF: 68-69
2018-07-31ramgeisNFno factor TF: 67-68
2016-09-11Gordon SpenceNFno factor TF: 66-67
2015-06-09VictordeHollanderNFno factor TF: 65-66
2013-12-04David CampeauNFno factor TF: 64-65
2013-10-11NesowaNFno factor TF: 63-64
2012-07-25NesowaNF-PM1B1=95000, B2=1757500, E=6
2002-07-20-anonymous-C-LLC9E0BABFC6832DDA
2002-06-02-anonymous-NF-PM1B1=35000, B2=350000
1999-07-26-anonymous-C-LLC9E0BABFC6832DDA
1999-03-01-anonymous-NFno factor TF: 1-63
1998-07-29-anonymous-NFno factor TF: 1-61