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
5018591
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 270
TF target 265
Factored
FactorDigitsBitsDate
331227007928.3old
ECM
DigitsB1Curves
2550000110 / 280
Estimated T-Level: 22.0
TF below 2^68 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-11-21storm55109E892ED238EB9E8D1421001553
Verified
PRP without proof (not generated)
2018-01-12kkmrkkblmbrbk9E892ED238EB9E8D1280515053
History
DateUserTypeResult
2025-01-17Sid & AndyNF-PM1B1=5600000, B2=7809777822
2025-01-02Sid & AndyNFno factor TF: 68-70
2024-08-31cramsey87NF-PM1B1=1000000, B2=2020317390
2023-05-11This -Anonymous-NF-PM1B1=50000, B2=1000000
2018-01-12kkmrkkblmbrbkC-PRPM5018591/331227007 : 9E892ED238EB9E8D
2017-11-21storm5510C-PRPM5018591/331227007 : 9E892ED238EB9E8D