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

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MnStatusDetails
20499497Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
4610842967449362076972168.62017-10-30 21:39:53
LL
StatusDateUserResidueShift
Verified (Factored)2004-04-09C. Cooper / S. Boone544D10A7ED189D553487063
Verified (Factored)2008-11-19-Anonymous-544D10A7ED189D5514276268
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-10-07riccardo uberti3DDD73FF11BBFE4612031610253
History
DateUserTypeResult
2025-05-04kkmrkkblmbrbkNF
no factor from 2^69 to 2^70
2020-10-07Albrecht HeefferCERT
PRP Certification
Proof certified good
2020-10-07riccardo ubertiC-PRP
M20499497/461084296744936207697 : 3DDD73FF11BBFE46
PRP proof power = 8
PRP: Verified
Proof certified good
2017-10-30VictordeHollanderF
Factor: 461084296744936207697 / TF: 68-69
2017-05-18ramgeisNF
no factor from 2^67 to 2^68
2015-02-27NRNF
no factor from 2^66 to 2^67
2014-12-12riccardo ubertiNF-PM1
B1=450000, B2=9500000, E=12
2008-11-19Net_ForceC-LL
544D10A7ED189D55