Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2892853Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
532284953929.0old
282962159769671444.72008-09-30 14:38:19
ECM
DigitsB1Curves
255000056 / 280
Estimated T-Level: 21.0
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-24Oliver Kruse31C8A5B8020FE4242146833953
Verified2017-12-08kkmrkkblmbrbk31C8A5B8020FE4242160464253
History
DateUserTypeResult
2022-12-02USAFSSNF-PM1
B1=320000, B2=243437040
2017-12-08kkmrkkblmbrbkC-PRP
M2892853/532284953/28296215976967 : 31C8A5B8020FE424
PRP: Verified
PRP without proof (not generated)
2017-10-24Oliver KruseC-PRP
M2892853/532284953/28296215976967 : 31C8A5B8020FE424
PRP: Verified
PRP without proof (not generated)
2008-09-30markrF
Factor: 28296215976967