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

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MnStatusDetails
12125963Factored
FactorDigitsBitsDate
653497239321238240698012375.82021-12-14 04:03:56
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-11-24Lars Geisler096D8B8B062C65339784400
Verified (Factored)2004-08-20AKINORI NEMOTO096D8B8B062C6533966576
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-01-26Poao33AF90A8998616FB11042405453
P-1 factors
DateFactorB1B2
2021-12-1465349723932123824069801600000306530910
History
DateUserTypeResult
2022-01-26KUNCEVO6CERT
PRP Certification
Proof certified good
2022-01-26PoaoC-PRP
M12125963/65349723932123824069801 : 33AF90A8998616FB
PRP proof power = 8
PRP: Verified
Proof certified good
2021-12-14lycornF-PM1
Factor: 65349723932123824069801 / (P-1, B1=600000, B2=306530910)
2021-10-23-Anonymous-NF
no factor from 2^71 to 2^72
2021-06-23ZacHFXNF
no factor from 2^70 to 2^71
2021-06-23ZacHFXNF
no factor from 2^69 to 2^70
2017-11-03ramgeisNF
no factor from 2^68 to 2^69
2015-07-06ThaNF
no factor from 2^67 to 2^68
2015-02-12ThaNF
no factor from 2^66 to 2^67
2013-09-30NesowaNF
no factor from 2^65 to 2^66
2013-09-19lycornNF
no factor from 2^64 to 2^65