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
5071903
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 270
TF target 265
Factored
FactorDigitsBitsDate
86856990107345211652.9old
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbk957475281B0265A11013
Verified
PRP without proof (not generated)
2018-05-01storm5510957475281B0265A11449295913
History
DateUserTypeResult
2025-02-21Sid & AndyNF-PM1B1=5100000, B2=7391272350
2025-01-18Sid & AndyNFno factor TF: 68-70
2023-05-11This -Anonymous-NF-PM1B1=50000, B2=1000000
2018-05-01storm5510C-PRPM5071903/8685699010734521 : 957475281B0265A1
2017-09-20kkmrkkblmbrbkC-PRPM5071903/8685699010734521 : 957475281B0265A1