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

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MnStatusDetails
1304983Composite, with 1 known prime factor. Cofactor is PRP (Probable-Prime).
Factored
FactorDigitsBitsDate
52199321825.6old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30Oliver KrusePRP_PRP_PRP_PRP_1013
Verified2017-10-22kkmrkkblmbrbkPRP_PRP_PRP_PRP_1124437313
History
DateUserTypeResult
2017-10-22kkmrkkblmbrbkP-PRP
M1304983/52199321 is a probable prime.
2017-09-30Oliver KruseP-PRP
M1304983/52199321 is a probable prime!
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12