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

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Exponent Range:










MnStatusDetails
11257Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
132311363475943690025066180852997340308740130.02009-03-05 15:09:11
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001293 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Unknown1FE50
Verified (Factored)George Woltman5D8FC21508501FE50
Verified (Factored)Brian J. Beesley5D8FC21508501FE50
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseA2A1837E586C96A31013
Verified2017-10-02kkmrkkblmbrbkA2A1837E586C96A31013
Verified2017-12-07ATHA2A1837E586C96A31745413
Verified2020-04-17Oliver KruseE46F0639BFC091921224653
Verified2024-07-01kkmrkkblmbrbkE46F0639BFC091921499653
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M11257/1323113634759436900250661808529973403087 : E46F0639BFC09192
PRP: Verified
PRP without proof (small exponent)
2022-12-30-Anonymous-NF-PM1
B1=100000000000, B2=122192573512709700
2020-04-17Oliver KruseC-PRP
M11257/1323113634759436900250661808529973403087 : E46F0639BFC09192
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M11257/1323113634759436900250661808529973403087 : A2A1837E586C96A3
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M11257/1323113634759436900250661808529973403087 : A2A1837E586C96A3
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M11257/1323113634759436900250661808529973403087 : A2A1837E586C96A3
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12
2009-03-05-Anonymous-F-ECM
Factor: 1323113634759436900250661808529973403087