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

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MnStatusDetails
3747847Factored
FactorDigitsBitsDate
32239258862241424785292271.42021-08-13 03:37:27
ECM
DigitsB1Curves
255000019 / 280
Estimated T-Level: 20.3
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-01-05Sean C. McGintyB4B92A758EF351BB0
Verified (Factored)1999-11-04Thomas HonoldB4B92A758EF351BB1888001
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-08-15/r/counting96A380D5D118AA651363511153
Verified2021-08-16kutens96A380D5D118AA651163100153
History
DateUserTypeResult
2022-05-25JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF-PM1
B1=100000
2022-03-03JossNF-PM1
B1=90000
2021-08-16Simon JosefssonCERT
PRP Certification
Proof certified good
2021-08-16kutensC-PRP
M3747847/3223925886224142478529 : 96A380D5D118AA65
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-15ky0urakuCERT
PRP Certification
Proof certified good
2021-08-15/r/countingC-PRP
M3747847/3223925886224142478529 : 96A380D5D118AA65
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-13kutensF-ECM
Factor: 3223925886224142478529 / (ECM curve 7, B1=50000, B2=6800000, Sigma=6576421677581387)
2021-03-21axnNF
no factor from 2^69 to 2^70
2020-12-09axnNF
no factor from 2^68 to 2^69
2018-06-18TJAOINF
no factor from 2^67 to 2^68
2016-11-06Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-26ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-11-22mikrNF-PM1
B1=1600000, B2=66000000, E=12
2015-01-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-03-15Squeeky_SquirrelNF-PM1
B1=110000, B2=2035000, E=6
2012-05-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-05-04markrNF
no factor to 2^62
2009-07-07Carsten KossendeyNF-PM1
B1=20000, B2=265000
2009-03-05S485122NF
no factor from 2^60 to 2^61