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
2489477
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
17466120842471340.7old
187519307340071444.12014-01-07 15:40:49
7478422348943540627032169.32025-04-15 08:48:41
ECM
DigitsB1Curves
2550000146 / 280
Estimated T-Level: 22.6 ⓘ
TF below 2^70 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
PRP without proof (not generated)
2017-10-14Oliver KruseEF804FBDE414A3A1249158553
Factored
PRP without proof (not generated)
2017-11-29storm5510EF804FBDE414A3A1280850953
Verified
Certified Good
2025-04-15Wojciech FlorekEF804FBDE414A3A1345103253
History
DateUserTypeResult
2025-04-15J. Gareth "Kit" MoretonCERT
Proof certified good
2025-04-15Wojciech FlorekC-PRPM2489477/1746612084247/18751930734007/747842234894354062703 : EF804FBDE414A3A1
Proof Certified Good

Proof Power: 7

2025-04-15Wojciech FlorekF-ECMFactor: 747842234894354062703 / ECM curve 13, B1=65085, B2=19025370, Edwards Sigma=2268925172113667
2022-08-19USAFSSNF-PM1B1=224000, B2=203668920
2017-11-29storm5510C-PRPM2489477/1746612084247/18751930734007 : EF804FBDE414A3A1
2017-10-14Oliver KruseC-PRPM2489477/1746612084247/18751930734007 : EF804FBDE414A3A1
2014-01-07TJAOIFFactor: 18751930734007