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

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Exponent Range:










MnStatusDetails
5007881Factored
FactorDigitsBitsDate
2046010132211870938617832477.42021-10-17 23:45:04
ECM
DigitsB1Curves
255000022 / 280
Estimated T-Level: 20.4 ⓘ
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Eric Leblanc69D37DFC6B2835B40
Verified (Factored)2000-07-12arnaud69D37DFC6B2835B43116115
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-10-18ATH82B68F768ABABCC81389163453
History
DateUserTypeResult
2021-10-18Stefano GibelliniCERT
PRP Certification
Proof certified good
2021-10-18ATHC-PRP
M5007881/204601013221187093861783 : 82B68F768ABABCC8
PRP proof power = 7
PRP: Verified
Proof certified good
2021-10-17ATHF-PP1
Start=2/7, B1=2500000, Factor: 204601013221187093861783
2021-04-04-Anonymous-NF
no factor from 2^72 to 2^73
2021-04-03-Anonymous-NF
no factor from 2^71 to 2^72
2021-04-01-Anonymous-NF
no factor from 2^70 to 2^71
2021-04-01-Anonymous-NF
no factor from 2^69 to 2^70
2021-02-23TJAOINF
no factor from 2^68 to 2^69
2018-07-09mikrNF-PM1
B1=3600000, B2=120000000, E=12
2017-10-22mikrNF
no factor from 2^67 to 2^68
2016-12-02Squeeky_SquirrelNF-PM1
B1=300000, B2=9375000, E=12
2016-05-13Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^63
2015-07-23snme2pm1NF
no factor from 2^65 to 2^66
2014-11-10JossNF-PM1
B1=67817
2014-08-29lycornNF
no factor from 2^64 to 2^65
2014-08-26krackerNF
no factor from 2^63 to 2^64
2009-07-13USAFSSNF-PM1
B1=55000, B2=907500, E=6