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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
11971Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
11611871823.5old
23175857824.52008-08-26 19:58:35
456479129691135.42008-08-26 19:58:35
12825091295196745211960.22008-08-29 02:24:28
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001282 / 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 KruseA774586921285C604013
Verified2017-10-02kkmrkkblmbrbkA774586921285C604013
Verified2017-12-07ATHA774586921285C6041187513
Verified2020-04-17Oliver Kruse30F8E5D0EA7C2A7A4114553
Verified2024-07-01kkmrkkblmbrbk30F8E5D0EA7C2A7A41143553
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M11971/11611871/1282509129519674521/23175857/45647912969 : 30F8E5D0EA7C2A7A
PRP: Verified
PRP without proof (small exponent)
2023-04-06-Anonymous-NF-PM1
B1=100000000000, B2=122192573512709700
2020-04-17Oliver KruseC-PRP
M11971/11611871/23175857/45647912969/1282509129519674521 : 30F8E5D0EA7C2A7A
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M11971/11611871/23175857/45647912969/1282509129519674521 : A774586921285C60
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M11971/11611871/23175857/45647912969/1282509129519674521 : A774586921285C60
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M11971/11611871/23175857/45647912969/1282509129519674521 : A774586921285C60
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12
2008-08-29-Anonymous-F-ECM
Factor: 1282509129519674521
2008-08-26-Anonymous-F
Factor: 45647912969
2008-08-26-Anonymous-F
Factor: 23175857