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
13831Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
13858662011030.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002940 / 9201
Estimated T-Level: 41.6
TF below 2^133 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse0C14AB11D10BCC211013
Verified2017-10-12kkmrkkblmbrbk0C14AB11D10BCC211799513
Verified2020-04-17Oliver KruseB146AB3F4F30C2101520453
Verified2024-07-01kkmrkkblmbrbkB146AB3F4F30C21011362453
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M13831/1385866201 : B146AB3F4F30C210
PRP: Verified
PRP without proof (small exponent)
2024-01-29-Anonymous-NF-PM1
B1=100000000000, B2=122154521813133810
2023-05-21JacobZNF-PM1
B1=7900000000, B2=32522539163164050
2023-02-11USAFSSNF-PM1
B1=10000000, B2=704560436580
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-17Oliver KruseC-PRP
M13831/1385866201 : B146AB3F4F30C210
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M13831/1385866201 : 0C14AB11D10BCC21
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13831/1385866201 : 0C14AB11D10BCC21
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13831/1385866201 : 0C14AB11D10BCC21
PRP without proof (not generated)