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

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MnStatusDetails
5322217Factored
FactorDigitsBitsDate
81581775323386968486789057842234191833739129.32022-09-13 17:59:09
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-11-21Michael Bryan5332479D9C13412F0
Verified (Factored)2000-07-17C. Cooper / S. Boone5332479D9C13412F2307912
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-09-19g0b13C6AD7C0B86E8F81314200453
P-1 factors
DateFactorB1B2
2022-09-13815817753233869684867890578422341918337400000010285831710
History
DateUserTypeResult
2022-09-19K. JeongCERT
PRP Certification
Proof certified good
2022-09-19g0bC-PRP
M5322217/815817753233869684867890578422341918337 : 13C6AD7C0B86E8F8
PRP proof power = 7
PRP: Verified
Proof certified good
2022-09-13Sid & AndyF-PM1
Factor: 815817753233869684867890578422341918337 / (P-1, B1=4000000, B2=10285831710)
2022-02-09mikrNF
no factor from 2^70 to 2^71
2022-01-22Gordon SpenceNF
no factor from 2^69 to 2^70
2020-08-31TJAOINF
no factor from 2^68 to 2^69
2019-06-16KingNF-PM1
B1=1000000, B2=22500000, E=6
2018-06-19ramgeisNF
no factor from 2^67 to 2^68
2016-08-04Gordon SpenceNF
no factor from 2^66 to 2^67
2015-08-16snme2pm1NF
no factor from 2^65 to 2^66
2014-12-24VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-24VictordeHollanderNF
no factor from 2^63 to 2^64
2010-09-12Squeeky_SquirrelNF-PM1
B1=60000, B2=990000, E=6
2009-05-30GrunwalderGIMPNF
no factor from 2^62 to 2^63