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

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MnDetails
2493851
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
335173574411135.0old
ECM
DigitsB1Curves
2550000131 / 280
Estimated T-Level: 22.3
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)
2017-10-14Oliver Kruse186808BCDA3A0F0A1156368653
Verified
PRP without proof (not generated)
2017-11-30storm5510186808BCDA3A0F0A180649253
History
DateUserTypeResult
2019-07-04alpertronNF-PM1B1=2000000, B2=60000000, E=12
2017-11-30storm5510C-PRP
M2493851/33517357441 : 186808BCDA3A0F0A
2017-10-14Oliver KruseC-PRP
M2493851/33517357441 : 186808BCDA3A0F0A