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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Exponent Range:





MnDetails
6853477
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
96226682432474860704012273.02020-08-13 13:08:26
P-1 factors
DateFactorsB1B2
2020-08-139622668243247486070401
250000050000000
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
Factored1999-09-22Mark Fermann71E01D4733343C193697699Windows,Prime95,v18,(aka WU1)
Factored2000-07-12Marcel Samek71E01D4733343C193719455Windows,Prime95,v19,(aka WV1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
Certified Good
2020-08-13storm5510E229A5804613DC781362518453
History
DateUserTypeResult
2020-08-13Team_InspectorCERT
Proof certified good
2020-08-13storm5510C-PRP
Proof Certified Good

Proof Power: 8

2020-08-13takahashiF-PM1Factor: 9622668243247486070401 / B1=2500000, B2=50000000
2020-05-22TJAOINFno factor TF: 68-69
2019-04-16takahashiNF-PM1B1=300000, B2=5000000, E=6
2018-02-26-anonymous-NFno factor TF: 67-68
2016-05-06Gordon SpenceNFno factor TF: 66-67
2015-06-26VictordeHollanderNFno factor TF: 65-66
2014-03-26lycornNFno factor TF: 64-65
2014-03-26lycornNFno factor TF: 63-64
2012-08-07NesowaNF-PM1B1=80000, B2=1460000, E=6
2009-06-25Carsten KossendeyNF-PM1B1=35000, B2=542500
2004-11-03David CampeauNFno factor TF: 1-63
2000-07-12-anonymous-C-LL71E01D4733343C19
1999-09-22-anonymous-C-LL71E01D4733343C19
1998-07-21-anonymous-NFno factor TF: 1-62
1998-07-05-anonymous-NFno factor TF: 1-61