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

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MnStatusDetails
3516089Factored
FactorDigitsBitsDate
3819761765875000796002092478.32021-11-16 12:00:04
2546136303675874632646817692787.72021-11-16 12:00:04
ECM
DigitsB1Curves
255000060 / 280
Estimated T-Level: 21.1 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Bad1998-03-23Eric Prestemon210E7EA5B4634D050
Verified (Factored)1999-09-07Andy Verzakov36EA2A57322A16DA1883923
Verified (Factored)1999-11-10Jack Shoup36EA2A57322A16DA3124375
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-11-24LordJuliusA7FB89C3F768E064247829653
P-1 factors
DateFactorB1B2
2021-11-16972563410348740616716394441562447849359911308897214000000150000000
History
DateUserTypeResult
2022-09-09JossNF-PM1
B1=1000000, B2=233218440
2022-04-26JossNF-PM1
B1=1000000, B2=145208700
2021-11-24curtiscCERT
PRP Certification
Proof certified good
2021-11-24LordJuliusC-PRP
M3516089/254613630367587463264681769/381976176587500079600209 : A7FB89C3F768E064
PRP proof power = 7
PRP: Verified
Proof certified good
2021-11-16mikrF-PM1
Factor: 97256341034874061671639444156244784935991130889721 / (P-1, B1=4000000, B2=150000000, E=12)
2021-08-30ArtyomPNF-PP1
Start=6/5, B1=50000, B2=2500000
2021-08-30ArtyomPNF-PP1
Start=2/7, B1=50000, B2=2500000
2021-03-19-Anonymous-NF
no factor from 2^71 to 2^72
2021-03-17-Anonymous-NF
no factor from 2^70 to 2^71
2021-03-17-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-17axnNF
no factor from 2^68 to 2^69
2018-12-03TJAOINF
no factor from 2^67 to 2^68
2017-01-10Gordon SpenceNF
no factor from 2^66 to 2^67
2016-03-04ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-01-27VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-27VictordeHollanderNF
no factor from 2^63 to 2^64
2012-06-20GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-11-16markrNF-PM1
B1=235000, B2=5933750, E=12
2011-07-06markrNF
no factor from 2^61 to 2^62
2009-07-06Carsten KossendeyNF-PM1
B1=20000, B2=240000
2009-03-20Jayson KingNF
no factor from 2^60 to 2^61