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

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MnStatusDetails
11831Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
23663514.5old
245830433511134.52008-08-26 19:58:35
47131049466662564631962.02008-08-26 19:58:35
24974676234102472386534228949511933107.62009-09-13 09:34:34
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001281 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse1E302F45520962D94013
Verified2017-10-02kkmrkkblmbrbk1E302F45520962D94013
Verified2017-12-07ATH1E302F45520962D94989913
Verified2020-04-17Oliver Kruse5A75BE3AFBA310BA4652153
Verified (Factored)2022-05-12Jorge Coveiro5A75BE3AFBA310BA1602053
Verified2024-07-01kkmrkkblmbrbk5A75BE3AFBA310BA41148053
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M11831/23663/24583043351/249746762341024723865342289495119/4713104946666256463 : 5A75BE3AFBA310BA
PRP: Verified
PRP without proof (small exponent)
2023-03-26-Anonymous-NF-PM1
B1=100000000000, B2=122192573512709700
2022-05-12Jorge CoveiroC-PRP
M11831/23663 : 5A75BE3AFBA310BA
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M11831/23663/24583043351/4713104946666256463/249746762341024723865342289495119 : 5A75BE3AFBA310BA
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M11831/23663/24583043351/4713104946666256463/249746762341024723865342289495119 : 1E302F45520962D9
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M11831/23663/24583043351/4713104946666256463/249746762341024723865342289495119 : 1E302F45520962D9
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M11831/23663/24583043351/4713104946666256463/249746762341024723865342289495119 : 1E302F45520962D9
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M11831/23663/24583043351/4713104946666256463/249746762341024723865342289495119 : 1E302F45520962D9
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12
2009-09-13Rob_DeeF-ECM
Factor: 249746762341024723865342289495119
2008-08-26-Anonymous-F-ECM
Factor: 4713104946666256463
2008-08-26-Anonymous-F
Factor: 24583043351