Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2831971Factored
FactorDigitsBitsDate
44641513467576711652.0old
1171294456972881734346172476.62023-01-31 05:44:40
ECM
DigitsB1Curves
255000060 / 280
Estimated T-Level: 21.1 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-22Oliver Kruse35BBF7CE52D03BDF1208749053
Verified (Factored)2017-12-07kkmrkkblmbrbk35BBF7CE52D03BDF1485053
Verified2023-02-01LordJulius35BBF7CE52D03BDF2194658453
P-1 factors
DateFactorB1B2
2023-01-31117129445697288173434617360000287380170
History
DateUserTypeResult
2023-02-01curtiscCERT
PRP Certification
Proof certified good
2023-02-01LordJuliusC-PRP
M2831971/4464151346757671/117129445697288173434617 : 35BBF7CE52D03BDF
PRP proof power = 7
PRP: Verified
Proof certified good
2023-01-31USAFSSF-PM1
Factor: 117129445697288173434617 / (P-1, B1=360000, B2=287380170)
2023-01-28Lisander ViaeneNF-PM1
B1=72000, B2=281496600
2017-12-07kkmrkkblmbrbkC-PRP
M2831971/4464151346757671 : 35BBF7CE52D03BDF
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-22Oliver KruseC-PRP
M2831971/4464151346757671 : 35BBF7CE52D03BDF
PRP: Verified (Factored)
PRP without proof (not generated)