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
7853Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
47119515.5old
255002617927.9old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000006466 / 9201
Estimated T-Level: 43.5
TF below 2^140 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse8014004C4E7AE2342013
Verified2017-10-12kkmrkkblmbrbk8014004C4E7AE2342336213
Verified2020-04-17Oliver KruseC26C691B2AAFDFC92260053
Verified2024-02-03Wentao HuangC26C691B2AAFDFC92572353
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M7853/47119/255002617 : C26C691B2AAFDFC9
PRP: Verified
PRP without proof (small exponent)
2021-07-10ViliamFNF-PM1
B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRP
M7853/47119/255002617 : C26C691B2AAFDFC9
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M7853/47119/255002617 : 8014004C4E7AE234
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7853/47119/255002617 : 8014004C4E7AE234
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7853/47119/255002617 : 8014004C4E7AE234
PRP without proof (not generated)