Marin Mersenne 2^P-1
Username
Password
Forgot password?
Blue
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
11491Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
76469387531032.8old
5758658045911080633246170258173098.92015-08-15 09:09:16
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001290 / 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 Kruse91D64F2AFB2546262013
Verified2017-10-02kkmrkkblmbrbk91D64F2AFB2546262013
Verified2017-12-07ATH91D64F2AFB2546262706813
Verified2020-04-17Oliver Kruse1CB804D8FBF8682E2394253
Verified2024-07-01kkmrkkblmbrbk1CB804D8FBF8682E2878753
P-1 factors
DateFactorB1B2
2023-01-20575865804591108063324617025817100000000000122192573512709696
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M11491/575865804591108063324617025817/7646938753 : 1CB804D8FBF8682E
PRP: Verified
PRP without proof (small exponent)
2023-01-20-Anonymous-F-PM1
Factor: 575865804591108063324617025817 / (P-1, B1=100000000000, B2=122192573512709700)
2020-04-17Oliver KruseC-PRP
M11491/7646938753/575865804591108063324617025817 : 1CB804D8FBF8682E
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M11491/7646938753/575865804591108063324617025817 : 91D64F2AFB254626
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M11491/7646938753/575865804591108063324617025817 : 91D64F2AFB254626
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M11491/7646938753/575865804591108063324617025817 : 91D64F2AFB254626
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12
2015-08-15BloodIceF-ECM
Factor: 575865804591108063324617025817 / (ECM curve 30, B1=1000000, B2=100000000)