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

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MnStatusDetails
338279Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
10824929823.4old
25806620926389479773672271.12014-10-10 12:40:49
ECM
DigitsB1Curves
2550000280 / 280
30250000462 / 640
Estimated T-Level: 28.6
TF below 2^90 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver KruseA88EA5199AF7011C2013
Verified2017-10-13Oliver KruseA88EA5199AF7011C226820013
Verified2017-12-12ATHA88EA5199AF7011C211583213
Verified2020-04-18Oliver Kruse749C0206E0301425210209053
Verified2024-09-10kkmrkkblmbrbk749C0206E0301425231169553
History
DateUserTypeResult
2024-09-10ChuckCERT
PRP Certification
Proof certified good
2024-09-10kkmrkkblmbrbkC-PRP
M338279/10824929/2580662092638947977367 : 749C0206E0301425
PRP proof power = 5
PRP: Verified
Proof certified good
2021-06-28George WoltmanNF-PP1
Start=2/7, B1=10000000, B2=830000000
2021-06-27George WoltmanNF-PM1
B1=20000000, B2=1820000000
2020-04-18Oliver KruseC-PRP
M338279/10824929/2580662092638947977367 : 749C0206E0301425
PRP: Verified
PRP without proof (small exponent)
2017-12-12ATHC-PRP
M338279/10824929/2580662092638947977367 : A88EA5199AF7011C
PRP: Verified
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M338279/10824929/2580662092638947977367 : A88EA5199AF7011C
PRP: Verified
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M338279/10824929/2580662092638947977367 : A88EA5199AF7011C
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M338279/10824929/2580662092638947977367 : A88EA5199AF7011C
PRP without proof (not generated)
2014-10-10TJAOIF-ECM
Factor: 2580662092638947977367 / (ECM curve 5, B1=50000, B2=5000000)