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
2081Factored
FactorDigitsBitsDate
266369618.0old
3308791721.7old
3874823721.9old
7920287722.9old
12791282711030.3old
526488381137271445.6old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000062338 / 105362
Estimated T-Level: 58.0 ⓘ
TF below 2^188 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-21Oliver KruseACE65545FE4529036013
Verified2017-10-02kkmrkkblmbrbkACE65545FE4529036013
Verified2017-12-07ATHACE65545FE452903663113
Verified2020-04-17Oliver Kruse0FD4D416D85A31746108853
Verified2024-01-27Wentao Huang0FD4D416D85A31746145753
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2024-04-17Ethan O'Connorfactor ECM small0.00 % 2024-04-17
History
DateUserTypeResult
2024-04-20Ethan O'ConnorNF-PM1
B1=1000000, B2=273044951789610
2024-04-17masserNF-PM1
B1=100000000000, B2=281073562398078450
2024-01-27Wentao HuangC-PRP
M2081/266369/3308791/3874823/7920287/1279128271/52648838113727 : 0FD4D416D85A3174
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M2081/266369/3308791/3874823/7920287/1279128271/52648838113727 : 0FD4D416D85A3174
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M2081/266369/3308791/3874823/7920287/1279128271/52648838113727 : ACE65545FE452903
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M2081/266369/3308791/3874823/7920287/1279128271/52648838113727 : ACE65545FE452903
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M2081/known_factors : ACE65545FE452903
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=500000000, B2=50000000000, E=12