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

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Exponent Range:










MnStatusDetails
299843Factored
FactorDigitsBitsDate
392399043527132324588456498139643934111.62022-12-28 22:41:39
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000161 / 1566
Estimated T-Level: 30.5 ⓘ
TF below 2^96 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski5D550
Verified (Factored)Unknown5D550
Verified (Factored)Guillermo Ballester Valor98852BC1BB3DDD550
Verified (Factored)Eivind Triel98852BC1BB3DDD55195000
Verified (Factored)2001-12-08Alex Phillips98852BC1BB3DDD55254637
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-12-29LordJulius606642E707D4FE28126347653
P-1 factors
DateFactorB1B2
2022-12-2839239904352713232458845649813964392027000002076470806410
History
DateUserTypeResult
2022-12-29Massimo Cappelli (ik5pwa)CERT
PRP Certification
Proof certified good
2022-12-29LordJuliusC-PRP
M299843/3923990435271323245884564981396439 : 606642E707D4FE28
PRP proof power = 5
PRP: Verified
Proof certified good
2022-12-28Sid & AndyF-PM1
Factor: 3923990435271323245884564981396439 / (P-1, B1=202700000, B2=2076470806410)
2022-12-02Gordon SpenceNF
no factor from 2^67 to 2^68
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2022-02-20LordJuliusNF
no factor from 2^66 to 2^67
2021-12-05Seth_TrNF-PM1
B1=120000000, B2=40104554490
2021-12-05Seth_TrNF-PM1
B1=120000000
2019-05-28Gordon SpenceNF
no factor from 2^65 to 2^66
2017-08-26ConductorNF
no factor from 2^64 to 2^65
2016-01-03Gordon SpenceNF
no factor from 2^63 to 2^64
2016-01-03Gordon SpenceNF
no factor from 2^62 to 2^63
2015-08-13NRNF
no factor from 2^61 to 2^62
2013-06-11lycornNF
no factor from 2^60 to 2^61
2009-01-24Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-02Sturle SundeNF
no factor from 2^58 to 2^59
2008-11-16Jayson KingNF-PM1
B1=10000000, B2=400000000, E=12