Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
2276557
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 262
Factored
FactorDigitsBitsDate
127989491536491443.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000119 / 640
Estimated T-Level: 25.9 ⓘ
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)
2017-10-11Oliver KruseB5A7F525EB8B9A241013
Verified
PRP without proof (not generated)
2017-11-21storm5510B5A7F525EB8B9A24197017513
History
DateUserTypeResult
2017-11-21storm5510C-PRPM2276557/12798949153649 : B5A7F525EB8B9A24
2017-10-11Oliver KruseC-PRPM2276557/12798949153649 : B5A7F525EB8B9A24
2016-04-06alpertronNF-PM1B1=500000, B2=15000000, E=12