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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
26879Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
53759515.7old
9515167723.22008-08-26 19:59:15
21341927824.32008-08-26 19:59:15
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000002040 / 4588
Estimated T-Level: 37.2
TF below 2^119 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse0D18D64A38A5CA423013
Verified2017-10-12kkmrkkblmbrbk0D18D64A38A5CA4231023413
Verified2020-04-17Oliver KruseFC7950986F5899693728153
Verified (Factored)2022-05-12Jorge CoveiroFC7950986F5899691898353
Verified2024-07-01kkmrkkblmbrbkFC7950986F58996932637453
History
DateUserTypeResult
2024-11-21masserNF-PP1
Start=2/7, B1=100000000, B2=99900000000
2024-11-17masserNF-PP1
Start=6/5, B1=100000000, B2=99900000000
2024-11-16masserNF-PP1
Start=150/23, B1=100000000, B2=99900000000
2024-07-01kkmrkkblmbrbkC-PRP
M26879/21341927/53759/9515167 : FC7950986F589969
PRP: Verified
PRP without proof (small exponent)
2023-04-12nordiNF-PM1
B1=5000000000, B2=1516930270635780
2023-02-07nordiNF-PM1
B1=5000000000
2022-05-12Jorge CoveiroC-PRP
M26879/53759 : FC7950986F589969
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M26879/53759/9515167/21341927 : FC7950986F589969
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M26879/53759/9515167/21341927 : 0D18D64A38A5CA42
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M26879/53759/9515167/21341927 : 0D18D64A38A5CA42
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M26879/53759/9515167/21341927 : 0D18D64A38A5CA42
PRP without proof (not generated)
2016-12-15kkmrkkblmbrbkNF-PM1
B1=500000000, B2=10000000000, E=12
2008-08-26-Anonymous-F
Factor: 21341927
2008-08-26-Anonymous-F
Factor: 9515167