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
2489639
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
4979279722.2old
30570825804687748631961.42016-04-26 11:11:32
ECM
DigitsB1Curves
2550000147 / 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
Verified
PRP without proof (not generated)
2017-10-14Oliver KruseB062EA8502D0D54C2126075553
Verified
PRP without proof (not generated)
2017-11-29storm5510B062EA8502D0D54C2178378253
History
DateUserTypeResult
2022-08-19USAFSSNF-PM1B1=224000, B2=203668920
2017-11-29storm5510C-PRPM2489639/4979279/3057082580468774863 : B062EA8502D0D54C
2017-10-14Oliver KruseC-PRPM2489639/4979279/3057082580468774863 : B062EA8502D0D54C
2016-04-26TJAOIFFactor: 3057082580468774863