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

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MnStatusDetails
2850949Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
250883513927.9old
1813282912467852711857.32015-06-11 11:24:17
ECM
DigitsB1Curves
255000059 / 280
Estimated T-Level: 21.1
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-22Oliver Kruse1A864E52C854BD95244202953
Verified2017-12-07kkmrkkblmbrbk1A864E52C854BD952202674553
History
DateUserTypeResult
2022-11-17USAFSSNF-PM1
B1=255000, B2=203416290
2017-12-07kkmrkkblmbrbkC-PRP
M2850949/250883513/181328291246785271 : 1A864E52C854BD95
PRP: Verified
PRP without proof (not generated)
2017-10-22Oliver KruseC-PRP
M2850949/250883513/181328291246785271 : 1A864E52C854BD95
PRP: Verified
PRP without proof (not generated)
2015-06-11TJAOIF
Factor: 181328291246785271 / TF: 57-58