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

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Exponent Range:










MnStatusDetails
1993Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
11959513.5old
162389641927.3old
416965620171937209972920624932731101.7old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000049818 / 105362
Estimated T-Level: 57.4
TF below 2^186 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse38C882F12A5A918F3013
Verified2017-10-02kkmrkkblmbrbk38C882F12A5A918F3013
Verified2017-12-07ATH38C882F12A5A918F3128513
Verified2020-04-17Oliver KruseEF5C5B3DBD4CB266354953
Verified2020-08-12_p95holder_EF5C5B3DBD4CB266317453
Verified2024-07-11Ducho_YYZEF5C5B3DBD4CB2663177553
Verified2024-07-12Ducho_YYZEF5C5B3DBD4CB2663107153
History
DateUserTypeResult
2024-07-12Ducho_YYZC-PRP
M1993/11959/162389641/4169656201719372099729206249327 : EF5C5B3DBD4CB266
PRP: Verified
PRP without proof (small exponent)
2024-07-11Ducho_YYZC-PRP
M1993/11959/162389641/4169656201719372099729206249327 : EF5C5B3DBD4CB266
PRP: Verified
PRP without proof (small exponent)
2022-07-21mikrNF-PM1
B1=300000000000, B2=983223146706230430
2021-07-26ViliamFNF-PP1
Start=2/7, B1=1000000000, B2=221000000000
2020-08-12_p95holder_C-PRP
M1993/11959/162389641/4169656201719372099729206249327 : EF5C5B3DBD4CB266
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M1993/11959/162389641/4169656201719372099729206249327 : EF5C5B3DBD4CB266
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M1993/11959/162389641/4169656201719372099729206249327 : 38C882F12A5A918F
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M1993/11959/162389641/4169656201719372099729206249327 : 38C882F12A5A918F
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M1993/known_factors : 38C882F12A5A918F
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=1000000000, B2=100000000000, E=12