Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
6121Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
81237913826.3old
1036484424540218253372166.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001429 / 9201
Estimated T-Level: 40.8
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse0BCFB077340FC5E62013
Verified2017-10-12kkmrkkblmbrbk0BCFB077340FC5E62372013
Verified2020-04-17Oliver KruseCAD994634A6AED17212953
Verified2024-02-03Wentao HuangCAD994634A6AED172521553
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2024-10-21Denial140factor ECM small0.00 % 2024-10-24
2024-10-21Denial140factor ECM small0.00 % 2024-10-24
2024-10-21Denial140factor ECM small0.00 % 2024-10-24
2024-10-21Denial140factor ECM small0.00 % 2024-10-24
2024-10-21Denial140factor ECM small0.00 % 2024-10-24
2024-10-21Denial140factor ECM small0.00 % 2024-10-24
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M6121/81237913/103648442454021825337 : CAD994634A6AED17
PRP: Verified
PRP without proof (small exponent)
2023-07-29-Anonymous-NF-PM1
B1=40000000000, B2=169617550478676300
2021-07-09ViliamFNF-PM1
B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRP
M6121/81237913/103648442454021825337 : CAD994634A6AED17
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M6121/81237913/103648442454021825337 : 0BCFB077340FC5E6
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M6121/81237913/103648442454021825337 : 0BCFB077340FC5E6
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M6121/81237913/103648442454021825337 : 0BCFB077340FC5E6
PRP without proof (not generated)