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
13921Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
95542232636942706036012273.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001325 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse14AD8A38D4896D321013
Verified2017-10-12kkmrkkblmbrbk14AD8A38D4896D321694713
Verified2020-04-17Oliver Kruse98C6690B68CD5C6711278253
Verified2024-07-01kkmrkkblmbrbk98C6690B68CD5C671695853
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M13921/9554223263694270603601 : 98C6690B68CD5C67
PRP: Verified
PRP without proof (small exponent)
2023-11-30-Anonymous-NF-PM1
B1=100000000000, B2=122815096988293710
2023-05-22JacobZNF-PM1
B1=7900000000, B2=32522539163164050
2023-02-11USAFSSNF-PM1
B1=30000000, B2=2010341563230
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-17Oliver KruseC-PRP
M13921/9554223263694270603601 : 98C6690B68CD5C67
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M13921/9554223263694270603601 : 14AD8A38D4896D32
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13921/9554223263694270603601 : 14AD8A38D4896D32
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13921/9554223263694270603601 : 14AD8A38D4896D32
PRP without proof (not generated)