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
2585813
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
20014192631030.9old
22651721880011341.02008-07-14 20:25:11
1032940468797989531856.52015-04-09 11:39:02
ECM
DigitsB1Curves
2550000122 / 280
Estimated T-Level: 22.2
TF below 2^69 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-15Oliver Kruse61611E1ABA27024C317513753
Verified
PRP without proof (not generated)
2017-12-02storm551061611E1ABA27024C3136507953
History
DateUserTypeResult
2019-07-04alpertronNF-PM1B1=2000000, B2=60000000, E=12
2017-12-02storm5510C-PRP
M2585813/2001419263/2265172188001/103294046879798953 : 61611E1ABA27024C
2017-10-15Oliver KruseC-PRP
M2585813/2001419263/2265172188001/103294046879798953 : 61611E1ABA27024C
2015-04-09TJAOIFFactor: 103294046879798953
2008-07-14George WoltmanF-ECMFactor: 2265172188001