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
2345257
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 262
Factored
FactorDigitsBitsDate
576933223929.1old
20825882171031.02008-07-14 20:23:12
ECM
DigitsB1Curves
2550000280 / 280
30250000126 / 640
Estimated T-Level: 26.0
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-12Oliver Kruse85AA0D8054EB9C6A2013
Verified
PRP without proof (not generated)
2017-11-24storm551085AA0D8054EB9C6A271880013
History
DateUserTypeResult
2018-03-18alpertronNF-PM1B1=500000, B2=15000000, E=12
2017-11-24storm5510C-PRP
M2345257/576933223/2082588217 : 85AA0D8054EB9C6A
2017-10-12Oliver KruseC-PRPM2345257/576933223/2082588217 : 85AA0D8054EB9C6A
2008-07-14George WoltmanF-ECMFactor: 2082588217