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

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MnDetails
71
Composite, with 2 known prime factors. Cofactor is PRP (Probable-Prime).
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
228479617.8old
48544121825.5old
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
No proof (small exponent)
2018-01-24_p95holder_PRP_PRP_PRP_PRP_2013
History
DateUserTypeResult
2022-04-19KrieselNF-PM1B1=50000, B2=136004943574500
2018-01-24_p95holder_P-PRPM71/228479/48544121
PRP Cofactor