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
2209717Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
48621116922758140641126012582.02020-04-16 18:40:17
ECM
DigitsB1Curves
2550000280 / 280
30250000160 / 640
Estimated T-Level: 26.3 ⓘ
TF below 2^82 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Sverker NilssonF237CA866DA883290
Verified (Factored)1999-02-07Damon BeardenF237CA866DA88329139925
Verified (Factored)2018-04-17kkmrkkblmbrbkF237CA866DA883291291908
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-04-17Christoph Zenger83CD32061C76D2631141226853
Verified2020-04-18oodaira83CD32061C76D263139916553
History
DateUserTypeResult
2020-04-18oodairaC-PRP
M2209717/4862111692275814064112601 : 83CD32061C76D263
PRP: Verified
PRP without proof (not generated)
2020-04-17Christoph ZengerC-PRP
M2209717/4862111692275814064112601 : 83CD32061C76D263
PRP: Verified
PRP without proof (not generated)
2020-04-16KeysarecoolF-ECM
Factor: 4862111692275814064112601 / (ECM curve 1, B1=50000, B2=5000000, Sigma=3487810583707340)
2019-12-30mikrNF-PM1
B1=5000000, B2=200000000, E=12
2019-05-06TJAOINF
no factor from 2^67 to 2^68
2018-04-17kkmrkkblmbrbkC-LL
F237CA866DA88329
2016-12-12Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-12-09Alexander DubrovinNF-PM1
B1=2000000, B2=65000000, E=12
2015-12-08Alexander DubrovinNF-PM1
B1=2000000, B2=15000000, E=12
2015-11-11Alexander DubrovinNF-PM1
B1=1000000, B2=2500000, E=6
2015-10-22ramgeisNF
no factor from 2^65 to 2^66
2015-03-06VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-06VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-17JossNF-PM1
B1=148092
2014-06-24JossNF-PM1
B1=119046
2013-12-04LaurVNF
no factor from 2^62 to 2^63
2011-01-08markrNF-PM1
B1=90000, B2=1665000, E=6
2010-11-10JossNF-PM1
B1=30000
2010-11-05JossNF-PM1
B1=15000
2009-01-08Sturle SundeNF
no factor from 2^61 to 2^62
2009-01-02Sturle SundeNF
no factor from 2^60 to 2^61