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
256163Factored
FactorDigitsBitsDate
99197885628054898372332273.12007-12-27 19:27:44
ECM
DigitsB1Curves
2550000280 / 280
30250000428 / 640
Estimated T-Level: 28.3
TF below 2^89 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver KruseEA83AC3F6CEDED7D1013
Verified2017-10-12Oliver KruseEA83AC3F6CEDED7D123068513
Verified2017-11-06kkmrkkblmbrbkEA83AC3F6CEDED7D11414613
Verified2020-04-17Oliver KruseA02597E106D9EA7F122466053
Verified2024-02-03Wentao HuangA02597E106D9EA7F117392253
History
DateUserTypeResult
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M256163/9919788562805489837233 : A02597E106D9EA7F
PRP proof power = 5
PRP: Verified
Proof certified good
2022-04-27Oliver KruseNF-PM1
B1=30000000, B2=10035812696910
2021-09-05Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M256163/9919788562805489837233 : A02597E106D9EA7F
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M256163/9919788562805489837233 : EA83AC3F6CEDED7D
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M256163/9919788562805489837233 : EA83AC3F6CEDED7D
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M256163/9919788562805489837233 : EA83AC3F6CEDED7D
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M256163/9919788562805489837233 : EA83AC3F6CEDED7D
PRP without proof (not generated)
2007-12-27Chad DavisF-ECM
Factor: 9919788562805489837233