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:





MnDetails
11503
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
58918367825.8old
24022815737111341.12008-08-26 19:58:35
3162833322209691548.22008-08-26 19:58:35
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002638 / 9201
Estimated T-Level: 41.4
TF below 2^133 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver KruseB85B5E55FB2888853013
Verified
No proof (small exponent)
2017-10-12kkmrkkblmbrbkB85B5E55FB2888853296613
Verified
No proof (small exponent)
2020-04-17Oliver KruseC35B14028A1E963C3810853
Verified
No proof (small exponent)
2024-07-01kkmrkkblmbrbkC35B14028A1E963C3393753
History
DateUserTypeResult
2025-03-16masserNF-PP1Start=79/71, B1=430000000, B2=429570000000
2025-02-28masserNF-PP1Start=6/5, B1=430000000, B2=429570000000
2025-01-23masserNF-PP1Start=2/7, B1=430000000, B2=429570000000
2024-07-01kkmrkkblmbrbkC-PRPM11503/2402281573711/316283332220969/58918367 : C35B14028A1E963C
2023-01-20-anonymous-NF-PM1B1=100000000000, B2=122192573512709700
2020-04-17Oliver KruseC-PRPM11503/58918367/2402281573711/316283332220969 : C35B14028A1E963C
2017-10-12kkmrkkblmbrbkC-PRPM11503/58918367/2402281573711/316283332220969 : B85B5E55FB288885
2017-09-21Oliver KruseC-PRPM11503/58918367/2402281573711/316283332220969 : B85B5E55FB288885
2017-09-21Oliver KruseC-PRPM11503/58918367/2402281573711/316283332220969 : B85B5E55FB288885
2016-09-07kkmrkkblmbrbkNF-PM1B1=100000000, B2=10000000000, E=12
2011-02-05Oscar ÖstlinFFactor: 141538507397242249937
2011-02-05Oscar ÖstlinFFactor: 316283332220969
2011-02-05Oscar ÖstlinFFactor: 18634897443777976637623
2008-08-26-anonymous-F-PM1Factor: 316283332220969
2008-08-26-anonymous-FFactor: 2402281573711