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
5506141
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 270
TF target 266
Factored
FactorDigitsBitsDate
385429871928.5old
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-12-04kkmrkkblmbrbk1D287BEE3755EC101442400953
Verified
PRP without proof (not generated)
2018-07-01storm55101D287BEE3755EC10181740753
History
DateUserTypeResult
2025-05-31Sid & AndyNF-PM1B1=4700000, B2=7611542400
2025-05-09Sid & AndyNFno factor TF: 68-70
2023-05-11This -Anonymous-NF-PM1B1=50000, B2=1000000
2018-07-01storm5510C-PRPM5506141/385429871 : 1D287BEE3755EC10
2017-12-04kkmrkkblmbrbkC-PRPM5506141/385429871 : 1D287BEE3755EC10