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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MnStatusDetails
1074299Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
2148599721.0old
1856646503771237.42008-07-16 09:31:00
ECM
DigitsB1Curves
2550000280 / 280
30250000104 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-01Kriesel27DAA704B6D82945013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver KruseF4B6ECBE8E9940072013
Verified2017-10-16Oliver KruseF4B6ECBE8E994007216812113
Verified2018-01-01ATHF4B6ECBE8E9940072106812813
History
DateUserTypeResult
2025-09-01ANONYMOUSCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
27DAA704B6D82945
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-08-22cramsey87NF-PM1
B1=3000000, B2=22221719520
2018-01-01ATHC-PRP
M1074299/2148599/185664650377 : F4B6ECBE8E994007
PRP: Verified
PRP without proof (not generated)
2017-10-16Oliver KruseC-PRP
M1074299/2148599/185664650377 : F4B6ECBE8E994007
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1074299/2148599/185664650377 : F4B6ECBE8E994007
PRP: Verified
PRP without proof (not generated)
2008-07-16J FeitsmaF
Factor: 185664650377