Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

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MnStatusDetails
17191Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1547191720.6old
75777929826.22008-08-26 19:58:49
90300884811033.12008-08-26 19:58:49
153204457771931443.82008-08-26 19:58:49
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002013 / 9201
Estimated T-Level: 41.1
TF below 2^132 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse98F150EA0F05186E4013
Verified2017-10-02kkmrkkblmbrbk98F150EA0F05186E4013
Verified2017-12-07ATH98F150EA0F05186E4378613
Verified2020-04-17Oliver KruseAFC3CB82F678B0204111253
Verified2024-07-01kkmrkkblmbrbkAFC3CB82F678B0204924253
History
DateUserTypeResult
2025-01-01masserNF-PP1
Start=181/67, B1=132000000, B2=131868000000
2024-12-21masserNF-PP1
Start=6/5, B1=132000000, B2=131868000000
2024-12-11masserNF-PP1
Start=2/7, B1=132000000, B2=131868000000
2024-07-01kkmrkkblmbrbkC-PRP
M17191/15320445777193/1547191/75777929/9030088481 : AFC3CB82F678B020
PRP: Verified
PRP without proof (small exponent)
2023-05-22JacobZNF-PM1
B1=6200000000, B2=17839036370945790
2023-02-16USAFSSNF-PM1
B1=60000000, B2=4543108760190
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-17Oliver KruseC-PRP
M17191/1547191/75777929/9030088481/15320445777193 : AFC3CB82F678B020
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M17191/1547191/75777929/9030088481/15320445777193 : 98F150EA0F05186E
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M17191/1547191/75777929/9030088481/15320445777193 : 98F150EA0F05186E
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M17191/1547191/75777929/9030088481/15320445777193 : 98F150EA0F05186E
PRP without proof (not generated)
2008-08-26-Anonymous-F
Factor: 15320445777193
2008-08-26-Anonymous-F
Factor: 9030088481
2008-08-26-Anonymous-F
Factor: 75777929