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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MnDetails
6572857
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 267
Factored
FactorDigitsBitsDate
39437143825.2old
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-12-27Oliver KruseF004BE448884346A1402523753
Verified
PRP without proof (not generated)
2018-10-26storm5510F004BE448884346A131221253
History
DateUserTypeResult
2025-01-24Stef42NF-PM1B1=2296000, B2=5551985670
2023-12-08Stef42NF-PM1B1=109000, B2=124105800
2018-10-26storm5510C-PRPM6572857/39437143 : F004BE448884346A
2017-12-27Oliver KruseC-PRPM6572857/39437143 : F004BE448884346A