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
517289Factored
FactorDigitsBitsDate
78752077371032.9old
99423138595420811511963.12015-04-12 13:48:17
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6 ⓘ
TF below 2^83 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-27Oliver KruseEE0F22AD1C746C0D2013
Verified2017-09-28Oliver KruseEE0F22AD1C746C0D2013
Verified2017-11-07kkmrkkblmbrbkEE0F22AD1C746C0D222999313
Unverified (Reliable)2020-04-19Oliver Kruse661302781BAF2A__242615053
History
DateUserTypeResult
2022-12-19USAFSSNF-PM1
B1=2000000, B2=6733146420
2020-04-19Oliver KruseC-PRP
M517289/7875207737/9942313859542081151 : 661302781BAF2A__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-07kkmrkkblmbrbkC-PRP
M517289/7875207737/9942313859542081151 : EE0F22AD1C746C0D
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M517289/7875207737/9942313859542081151 : EE0F22AD1C746C0D
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M517289/7875207737/9942313859542081151 : EE0F22AD1C746C0D
PRP: Unverified (Reliable)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=1500000, B2=50000000, E=12
2015-04-12Richard B. WoodsF-ECM
Factor: 9942313859542081151