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
823271Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1646543720.7old
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver KruseA7A2AED5DFF646C01013
Verified2017-10-14Oliver KruseA7A2AED5DFF646C0124751813
Verified2017-12-18ATHA7A2AED5DFF646C0138307013
Verified2020-04-21Oliver Kruse82440EEBF4752A2F160318253
Verified2022-05-12Jorge Coveiro82440EEBF4752A2F150978753
Verified2025-01-04kkmrkkblmbrbk82440EEBF4752A2F11119953
History
DateUserTypeResult
2025-01-04PrimeDirectiveCERT
PRP Certification
Proof certified good
2025-01-04kkmrkkblmbrbkC-PRP
M823271/1646543 : 82440EEBF4752A2F
PRP proof power = 6
PRP: Verified
Proof certified good
2022-05-12Jorge CoveiroC-PRP
M823271/1646543 : 82440EEBF4752A2F
PRP proof power = 6
PRP: Verified
PRP proof never uploaded
2020-04-21Oliver KruseC-PRP
M823271/1646543 : 82440EEBF4752A2F
PRP: Verified
PRP without proof (small exponent)
2017-12-18ATHC-PRP
M823271/1646543 : A7A2AED5DFF646C0
PRP: Verified
PRP without proof (small exponent)
2017-10-14Oliver KruseC-PRP
M823271/1646543 : A7A2AED5DFF646C0
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M823271/1646543 : A7A2AED5DFF646C0
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12