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

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MnStatusDetails
1854889Factored
FactorDigitsBitsDate
3551683142179985516712168.32021-01-24 15:25:45
8130423149435536368072169.52014-08-16 16:45:02
27866499671373844358232271.22021-07-30 10:29:24
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-05-16Robert Goold80A5B136D0E32BC50
Verified (Factored)1998-12-21Stephen Wood80A5B136D0E32BC51294528
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-04Oliver KruseC0345EEDA0A5859C1013
Verified (Factored)2017-11-07Chang Chia-TcheC0345EEDA0A5859C159523013
Verified (Factored)2021-01-24tanaydinF91EE2CCB43E4AF72101341453
Verified2021-08-01/r/countingF91EE2CCB43E4AF73113048453
History
DateUserTypeResult
2021-08-01curtiscCERT
PRP Certification
Proof certified good
2021-08-01/r/countingC-PRP
M1854889/355168314217998551671/813042314943553636807/2786649967137384435823 : F91EE2CCB43E4AF7
PRP proof power = 7
PRP: Verified
Proof certified good
2021-07-30TJAOIF-ECM
Factor: 2786649967137384435823 / (ECM curve 54, B1=50000, B2=6600000)
2021-01-24Architects CubedCERT
PRP Certification
Proof certified good
2021-01-24tanaydinC-PRP
M1854889/813042314943553636807/355168314217998551671 : F91EE2CCB43E4AF7
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2021-01-24seatseaF-ECM
Factor: 355168314217998551671 / (ECM curve 7, B1=50000, B2=5850000, Sigma=72710086886310)
2017-11-07Chang Chia-TcheC-PRP
M1854889/813042314943553636807 : C0345EEDA0A5859C
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1854889/813042314943553636807 : C0345EEDA0A5859C
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2014-08-16Chang Chia-TcheF-ECM
Factor: 813042314943553636807 / (ECM curve 1, B1=50000, B2=5000000)
2014-05-26JossNF-PM1
B1=134603
2011-02-07Carsten KossendeyNF-PM1
B1=100000, B2=1700000, E=6
2011-01-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-14Architects CubedNF
no factor from 2^60 to 2^61