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
23Composite, with 1 known prime factor. Cofactor is PRP (Probable-Prime).
Factored
FactorDigitsBitsDate
4725.6old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2018-01-24_p95holder_PRP_PRP_PRP_PRP_1013
History
DateUserTypeResult
2021-12-27-Anonymous-NF-PM1
B1=1000000, B2=100000000, E=12
2018-01-24_p95holder_P-PRP
M23/47 is a probable prime.