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
2445881
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
293505721928.1old
ECM
DigitsB1Curves
2550000199 / 280
Estimated T-Level: 23.6
TF below 2^73 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-13Oliver KruseAE7EFC8C6FAA18681218204653
Verified
PRP without proof (not generated)
2017-11-28storm5510AE7EFC8C6FAA18681212967853
History
DateUserTypeResult
2018-09-28alpertronNF-PM1B1=2000000, B2=60000000, E=12
2017-11-28storm5510C-PRPM2445881/293505721 : AE7EFC8C6FAA1868
2017-10-13Oliver KruseC-PRPM2445881/293505721 : AE7EFC8C6FAA1868