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
17851Factored
FactorDigitsBitsDate
2142121721.0old
31021110791031.52008-08-26 19:58:51
280175015211134.72008-08-26 19:58:51
7395881627862652011859.42008-08-29 02:24:39
1085113372389511571532166.62008-08-26 19:58:51
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000001464 / 4588
Estimated T-Level: 36.6
TF below 2^117 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse729A3A5DD71FFF915013
Verified2017-10-02kkmrkkblmbrbk729A3A5DD71FFF915013
Verified2017-12-07ATH729A3A5DD71FFF915718813
Unverified2020-04-17Oliver Kruse6CC53E295B67B5__5610453
History
DateUserTypeResult
2023-05-20JacobZNF-PM1
B1=5900000000, B2=16484172846891750
2021-08-27Seth_TrNF-PM1
B1=400000000
2020-04-17Oliver KruseC-PRP
M17851/2142121/3102111079/28017501521/739588162786265201/108511337238951157153 : 6CC53E295B67B5__
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M17851/2142121/3102111079/28017501521/739588162786265201/108511337238951157153 : 729A3A5DD71FFF91
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M17851/2142121/3102111079/28017501521/739588162786265201/108511337238951157153 : 729A3A5DD71FFF91
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M17851/known_factors : 729A3A5DD71FFF91
PRP without proof (not generated)
2008-08-29-Anonymous-F-ECM
Factor: 739588162786265201
2008-08-26-Anonymous-F-ECM
Factor: 108511337238951157153
2008-08-26-Anonymous-F
Factor: 28017501521
2008-08-26-Anonymous-F
Factor: 3102111079