Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
4390279Factored
FactorDigitsBitsDate
204258306859708482595932374.12022-10-08 17:39:57
ECM
DigitsB1Curves
255000012 / 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)1998-12-21Noah VawterBB8ACFC4BA1277080
Verified (Factored)2001-04-21Louis TowlesBB8ACFC4BA1277084249872
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-10-14PerigFD148682E4D4D7BF1319560353
P-1 factors
DateFactorB1B2
2022-10-0820425830685970848259593260000111707310
History
DateUserTypeResult
2022-10-14MathEnthousiastCERT
PRP Certification
Proof certified good
2022-10-14PerigC-PRP
M4390279/20425830685970848259593 : FD148682E4D4D7BF
PRP proof power = 7
PRP: Verified
Proof certified good
2022-10-08Kevin_9611F-PM1
Factor: 20425830685970848259593 / (P-1, B1=260000, B2=111707310)
2021-02-10-Anonymous-NF
no factor from 2^72 to 2^73
2021-01-31-Anonymous-NF
no factor from 2^71 to 2^72
2021-01-31-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-23-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-23-Anonymous-NF
no factor from 2^68 to 2^69
2018-10-30chuenkitNF
no factor from 2^67 to 2^68
2018-05-04chuenkitNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-20snme2pm1NF
no factor from 2^65 to 2^66
2014-07-28lycornNF
no factor from 2^64 to 2^65
2014-07-27JayderNF
no factor from 2^63 to 2^64
2013-09-21Squeeky_SquirrelNF-PM1
B1=150000, B2=3675000, E=6
2012-01-19GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-04-25USAFSSNF-PM1
B1=50000, B2=775000, E=6
2010-11-06markrNF
no factor from 2^61 to 2^62