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
7481Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1558134308143044695644316319593097.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002050 / 9201
Estimated T-Level: 41.1
TF below 2^132 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse907F2CED9BEFFFD51013
Verified2017-10-12kkmrkkblmbrbk907F2CED9BEFFFD51651413
Verified2020-04-17Oliver KruseCEC1902BFCFED2351365753
Verified2024-02-03Wentao HuangCEC1902BFCFED2351500253
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M7481/155813430814304469564431631959 : CEC1902BFCFED235
PRP: Verified
PRP without proof (small exponent)
2023-09-01-Anonymous-NF-PM1
B1=40000000000, B2=169617550478676300
2021-07-05ViliamFNF-PM1
B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRP
M7481/155813430814304469564431631959 : CEC1902BFCFED235
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M7481/155813430814304469564431631959 : 907F2CED9BEFFFD5
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7481/155813430814304469564431631959 : 907F2CED9BEFFFD5
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7481/155813430814304469564431631959 : 907F2CED9BEFFFD5
PRP without proof (not generated)