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

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MnStatusDetails
3371969Factored
FactorDigitsBitsDate
943081392221176526879932376.32021-10-25 20:20:13
ECM
DigitsB1Curves
255000055 / 280
Estimated T-Level: 21.0
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Florian HerzigA8A3E6A604D750ED0
Verified (Factored)1999-07-04Dan DavisA8A3E6A604D750ED3248525
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-11-02_p95holder_87F079A4DDBA791A1228195053
Verified2021-11-03LaurV87F079A4DDBA791A1336870053
History
DateUserTypeResult
2022-04-10JossNF-PM1
B1=1000000, B2=126668850
2022-04-09JossNF-PM1
B1=1000000
2022-02-25JossNF-PM1
B1=200000
2021-11-03Steve JacobsonCERT
PRP Certification
Proof certified good
2021-11-03LaurVC-PRP
M3371969/94308139222117652687993 : 87F079A4DDBA791A
PRP proof power = 7
PRP: Verified
Proof certified good
2021-11-02_p95holder_C-PRP
M3371969/94308139222117652687993 : 87F079A4DDBA791A
PRP: Verified
PRP without proof (not generated)
2021-10-25daveward2005F-ECM
Factor: 94308139222117652687993 / (ECM curve 4, B1=50000, B2=5000000, Sigma=2561506407674137)
2021-08-01JossNF
no factor from 2^68 to 2^69
2021-02-14mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-11-05TJAOINF
no factor from 2^67 to 2^68
2017-04-12JossNF-PM1
B1=330000, B2=3300000, E=6
2017-03-07Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-07-27Squeeky_SquirrelNF-PM1
B1=165000, B2=4331250, E=6
2015-03-30Gordon SpenceNF
no factor from 2^65 to 2^66
2015-02-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-15VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-12JossNF-PM1
B1=98070
2014-06-24JossNF-PM1
B1=79035
2012-11-15GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-10-17USAFSSNF-PM1
B1=60000, B2=930000, E=6
2011-08-19markrNF
no factor from 2^61 to 2^62
2009-07-09Carsten KossendeyNF-PM1
B1=15000, B2=206250
2009-03-27S485122NF
no factor from 2^60 to 2^61