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
2506957
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
416154863928.6old
616711423929.22008-07-14 20:24:28
280669228865991444.72008-09-30 14:37:07
46756687773597464467606572582.02025-05-16 01:05:17
ECM
DigitsB1Curves
255000099 / 280
Estimated T-Level: 21.8 ⓘ
TF below 2^67 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 Kruse4FE63203F5BA342E3231653553
Factored
PRP without proof (not generated)
2017-11-30storm55104FE63203F5BA342E3139781753
Verified
Certified Good
2025-05-22Michel Yamagishi4FE63203F5BA342E4211462253
History
DateUserTypeResult
2025-05-22Generic Username 3485CERT
Proof certified good
2025-05-22Michel YamagishiC-PRPM2506957/416154863/616711423/28066922886599/4675668777359746446760657 : 4FE63203F5BA342E
Proof Certified Good

Proof Power: 7

2025-05-16debrouxlF-ECMFactor: 4675668777359746446760657 / ECM curve 29, B1=65384, B2=6538400, Montgomery Sigma=6802719101291446
2022-08-20USAFSSNF-PM1B1=240000, B2=199861200
2017-11-30storm5510C-PRPM2506957/416154863/616711423/28066922886599 : 4FE63203F5BA342E
2017-10-14Oliver KruseC-PRPM2506957/416154863/616711423/28066922886599 : 4FE63203F5BA342E
2008-09-30markrFFactor: 28066922886599
2008-07-14George WoltmanF-ECMFactor: 616711423