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
7541Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
97119634091033.2old
685608122376994383527995303006099334112.4old
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 Kruse661797370114824F2013
Verified2017-10-02kkmrkkblmbrbk661797370114824F2013
Verified2017-12-07ATH661797370114824F2139813
Verified2020-04-17Oliver Kruse0007736A5A413F042225053
Verified2024-02-03Wentao Huang0007736A5A413F042283353
History
DateUserTypeResult
2024-11-09masserNF-PM1
B1=50000000000, B2=201265614041391900
2024-02-03Wentao HuangC-PRP
M7541/9711963409/6856081223769943835279953030060993 : 0007736A5A413F04
PRP: Verified
PRP without proof (small exponent)
2021-07-06ViliamFNF-PM1
B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRP
M7541/9711963409/6856081223769943835279953030060993 : 0007736A5A413F04
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M7541/9711963409/6856081223769943835279953030060993 : 661797370114824F
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M7541/9711963409/6856081223769943835279953030060993 : 661797370114824F
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7541/known_factors : 661797370114824F
PRP without proof (not generated)