Marin Mersenne 2^P-1
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MnStatusDetails
3331837Factored
FactorDigitsBitsDate
85974275335800120975132272.92021-06-09 01:31:55
ECM
DigitsB1Curves
255000038 / 280
Estimated T-Level: 20.7
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-06-01Trent Taufer6BCA3B7BF27CFE3B0
Verified (Factored)1999-11-10Tomasz Jakutowicz6BCA3B7BF27CFE3B1359786
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-06-10Chang Chia-Tche1D414BD3D020F7CC1331268053
History
DateUserTypeResult
2022-09-12JossNF-PM1
B1=1000000, B2=241152450
2022-04-02JossNF-PM1
B1=1000000, B2=134316000
2021-06-10xyuzyzCERT
PRP Certification
Proof certified good
2021-06-10Chang Chia-TcheC-PRP
M3331837/8597427533580012097513 : 1D414BD3D020F7CC
PRP proof power = 7
PRP: Verified
Proof certified good
2021-06-09daveward2005F-ECM
Factor: 8597427533580012097513 / (ECM curve 2, B1=50000, B2=5000000, Sigma=3673078354559814)
2020-05-31mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-11-12TJAOINF
no factor from 2^67 to 2^68
2018-08-16JossNF-PM1
B1=420000, B2=3360000
2018-08-15JossNF-PM1
B1=420000, B2=2940000
2018-08-07JossNF-PM1
B1=420000, B2=840000
2017-02-28Gordon SpenceNF
no factor from 2^66 to 2^67
2016-03-02omylistNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-02-11VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-11VictordeHollanderNF
no factor from 2^63 to 2^64
2012-11-24Squeeky_SquirrelNF-PM1
B1=210000, B2=4672500, E=6
2012-08-25GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-10-06USAFSSNF-PM1
B1=55000, B2=880000, E=6
2011-09-01markrNF
no factor to 2^62
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=202500
2009-03-30S485122NF
no factor from 2^60 to 2^61