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

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MnStatusDetails
2953879Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1138129578711236.7old
2555518878071237.92008-09-07 19:43:04
18389609152834919211960.72016-02-25 12:28:47
ECM
DigitsB1Curves
255000071 / 280
Estimated T-Level: 21.3
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron31E267EA223DD8B43013
Verified2017-11-17Oliver Kruse31E267EA223DD8B43111351213
History
DateUserTypeResult
2022-12-05USAFSSNF-PM1
B1=320000, B2=243437040
2017-11-17Oliver KruseC-PRP
M2953879/113812957871/255551887807/1838960915283491921 : 31E267EA223DD8B4
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2953879/113812957871/1838960915283491921/255551887807 : 31E267EA223DD8B4
PRP: Verified
PRP without proof (not generated)
2016-02-25TJAOIF
Factor: 1838960915283491921 / TF: 60-61
2008-09-07Will EdgingtonF
Factor: 255551887807