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
7873Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1180951720.2old
12001601211030.2old
9996258725123195597975366784883332106.3old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000006059 / 9201
Estimated T-Level: 43.3
TF below 2^139 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse2C2CBFC1510437093013
Verified2017-10-02kkmrkkblmbrbk2C2CBFC1510437093013
Verified2017-12-07ATH2C2CBFC1510437093733413
Verified2020-04-17Oliver Kruse12C94DF4F0C39F0B3298653
Verified2024-02-03Wentao Huang12C94DF4F0C39F0B3121953
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M7873/1180951/1200160121/99962587251231955979753667848833 : 12C94DF4F0C39F0B
PRP: Verified
PRP without proof (small exponent)
2021-07-10ViliamFNF-PM1
B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRP
M7873/1180951/1200160121/99962587251231955979753667848833 : 12C94DF4F0C39F0B
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M7873/1180951/1200160121/99962587251231955979753667848833 : 2C2CBFC151043709
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M7873/1180951/1200160121/99962587251231955979753667848833 : 2C2CBFC151043709
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7873/known_factors : 2C2CBFC151043709
PRP without proof (not generated)