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

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Exponent Range:










MnStatusDetails
1997939Factored
FactorDigitsBitsDate
6409686604292711549.2old
14313980260492704971960.32016-01-28 12:23:52
2762245320189296418295769532787.82021-07-15 08:35:38
ECM
DigitsB1Curves
2550000280 / 280
3025000060 / 640
Estimated T-Level: 25.5 ⓘ
TF below 2^80 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-05Oliver Kruse1218AB0EFDECE47A2013
Verified (Factored)2017-11-13ATH1218AB0EFDECE47A266687713
Verified2021-07-15/r/countingA12BD0EC8FA00F953111892053
History
DateUserTypeResult
2022-08-16USAFSSNF-PM1
B1=132000, B2=134381520
2022-03-09LordJuliusNF
no factor from 2^66 to 2^67
2021-08-03Daniil TsarkovNF
no factor from 2^69 to 2^70
2021-08-03Daniil TsarkovNF
no factor from 2^68 to 2^69
2021-08-03Daniil TsarkovNF
no factor from 2^67 to 2^68
2021-08-03Daniil TsarkovNF
no factor from 2^65 to 2^66
2021-08-03Daniil TsarkovNF
no factor from 2^64 to 2^65
2021-08-03Daniil TsarkovNF
no factor from 2^63 to 2^64
2021-08-03Daniil TsarkovNF
no factor from 2^62 to 2^63
2021-08-03Daniil TsarkovNF
no factor from 2^61 to 2^62
2021-07-15ANONYMOUSCERT
PRP Certification
Proof certified good
2021-07-15/r/countingC-PRP
M1997939/640968660429271/1431398026049270497/276224532018929641829576953 : A12BD0EC8FA00F95
PRP proof power = 7
PRP: Verified
Proof certified good
2021-07-15Daniil TsarkovF-ECM
Factor: 276224532018929641829576953 / (ECM curve 7, B1=50000, B2=5000000, Sigma=5187604362556371)
2017-11-13ATHC-PRP
M1997939/640968660429271/1431398026049270497 : 1218AB0EFDECE47A
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1997939/640968660429271/1431398026049270497 : 1218AB0EFDECE47A
PRP: Verified (Factored)
PRP without proof (not generated)
2016-01-28TJAOIF
Factor: 1431398026049270497 / TF: 60-61