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

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MnStatusDetails
2570831Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
5141663722.3old
8702052681591913191859.62015-12-01 12:10:37
ECM
DigitsB1Curves
2550000140 / 280
Estimated T-Level: 22.5
TF below 2^70 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron55FE9B297C32DBEE2013
Verified2017-11-11Oliver Kruse55FE9B297C32DBEE268731313
History
DateUserTypeResult
2022-09-01USAFSSNF-PM1
B1=300000, B2=258641460
2017-11-11Oliver KruseC-PRP
M2570831/5141663/870205268159191319 : 55FE9B297C32DBEE
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2570831/5141663/870205268159191319 : 55FE9B297C32DBEE
PRP: Verified
PRP without proof (not generated)
2015-12-01TJAOIF
Factor: 870205268159191319 / TF: 59-60