Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
20990471Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
10747482972292884440127179832889.82015-03-19 17:12:25
LL
StatusDateUserResidueShift
Verified (Factored)2004-03-16C. Cooper / S. BooneF150466829AF467C5117783
Verified (Factored)2008-09-16Heinz HorstmannF150466829AF467C19125305
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-03-09riccardo ubertiD694D1A8D7C7DA0C11601512853
Verified2020-06-15JaytholomewD694D1A8D7C7DA0C1997327253
P-1 factors
DateFactorB1B2
2015-03-1910747482972292884440127179834500009500000
History
DateUserTypeResult
2024-09-26kkmrkkblmbrbkNF
no factor from 2^69 to 2^70
2024-09-26kkmrkkblmbrbkNF
no factor from 2^68 to 2^69
2022-04-11LordJuliusNF
no factor from 2^67 to 2^68
2022-04-11LordJuliusNF
no factor from 2^66 to 2^67
2020-06-15JaytholomewC-PRP
M20990471/1074748297229288444012717983 : D694D1A8D7C7DA0C
PRP: Verified
PRP without proof (not generated)
2020-03-09riccardo ubertiC-PRP
M20990471/1074748297229288444012717983 : D694D1A8D7C7DA0C
PRP: Verified
PRP without proof (not generated)
2015-03-19riccardo ubertiF-PM1
Factor: 1074748297229288444012717983 / (P-1, B1=450000, B2=9500000, E=12)