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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2785639Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
243709364213812063378092374.42010-11-25 05:25:47
ECM
DigitsB1Curves
255000082 / 280
Estimated T-Level: 21.5
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David ClementsF998DE1AEE03D5AB0
Verified (Factored)Christian BreimannF998DE1AEE03D5AB0
Verified (Factored)1999-07-30Frank FullumF998DE1AEE03D5AB1154654
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-21Oliver KruseBDDEE9EBB0B2E2D41135643553
Verified2017-12-06kkmrkkblmbrbkBDDEE9EBB0B2E2D41266044353
History
DateUserTypeResult
2023-01-27USAFSSNF-PM1
B1=288000, B2=261254070
2017-12-06kkmrkkblmbrbkC-PRP
M2785639/24370936421381206337809 : BDDEE9EBB0B2E2D4
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2785639/24370936421381206337809 : BDDEE9EBB0B2E2D4
PRP: Verified
PRP without proof (not generated)
2010-11-25markrF-PM1
Factor: 24370936421381206337809
2010-11-11JossNF-PM1
B1=15000
2009-02-01Sturle SundeNF
no factor from 2^60 to 2^61