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
7811591
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 267
Factored
FactorDigitsBitsDate
41312706374640171651.9old
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2018-05-14storm55106B9C957EC358A6941663341053
Verified
PRP without proof (not generated)
2019-10-10ATH6B9C957EC358A6941731652453
History
DateUserTypeResult
2024-01-31Stef42NF-PM1B1=843000, B2=1382772300
2019-10-10ATHC-PRPM7811591/4131270637464017 : 6B9C957EC358A694
2018-05-14storm5510C-PRPM7811591/4131270637464017 : 6B9C957EC358A694