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

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MnStatusDetails
3296281Factored
FactorDigitsBitsDate
1877713898377718721065472310972932103.92021-03-29 03:28:53
ECM
DigitsB1Curves
255000031 / 280
Estimated T-Level: 20.6
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-01-27Marc Honey3822F961CB716E1D0
Verified (Factored)1999-06-26Aaron B3822F961CB716E1D2016255
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-03-31Joe S.C88082348D2578101171443353
History
DateUserTypeResult
2022-09-03JossNF-PM1
B1=1318512, B2=236513550
2022-03-17JossNF-PM1
B1=1000000, B2=134343300
2021-03-31ky0urakuCERT
PRP Certification
Proof certified good
2021-03-31Joe S.C-PRP
M3296281/18777138983777187210654723109729 : C88082348D257810
PRP proof power = 7
PRP: Verified
Proof certified good
2021-03-29daveward2005F-ECM
Factor: 18777138983777187210654723109729 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7418282112871889)
2020-02-10BigBrotherNF-PM1
B1=3000000, B2=90000000, E=12
2018-11-05TJAOINF
no factor from 2^67 to 2^68
2017-04-08Gordon SpenceNF
no factor from 2^66 to 2^67
2017-02-19JossNF-PM1
B1=238464, B2=2384640, E=6
2017-02-04JossNF-PM1
B1=198720
2017-01-29JossNF-PM1
B1=165600
2017-01-19JossNF-PM1
B1=138000
2015-07-02ThaNF
no factor from 2^65 to 2^66
2013-10-25David CampeauNF
no factor from 2^64 to 2^65
2013-09-09Squeeky_SquirrelNF-PM1
B1=115000, B2=2645000, E=6
2012-12-30lycornNF
no factor from 2^62 to 2^64
2012-12-30dbaughNF
no factor from 2^62 to 2^63
2011-10-05Grant McCrackenNF
no factor from 2^61 to 2^62
2011-09-27USAFSSNF-PM1
B1=60000, B2=1065000, E=6
2009-07-10Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-01S485122NF
no factor from 2^60 to 2^61