Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
1820249Factored
FactorDigitsBitsDate
16987397425007568797538492580.52016-08-26 07:29:05
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ken Kriesel5203E8116333242D0
Verified (Factored)1998-12-21Bernd R. Fix5203E8116333242D133466
Verified (Factored)2015-07-18MadPoo5203E8116333242D201035
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-03Oliver KruseC31D2757907081FF1013
Verified2017-11-06kkmrkkblmbrbkC31D2757907081FF1173315113
History
DateUserTypeResult
2017-11-06kkmrkkblmbrbkC-PRP
M1820249/1698739742500756879753849 : C31D2757907081FF
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1820249/1698739742500756879753849 : C31D2757907081FF
PRP: Verified
PRP without proof (not generated)
2016-08-26bamF-ECM
Factor: 1698739742500756879753849 / (ECM curve 1, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-09-03ramgeisNF
no factor from 2^65 to 2^66
2015-07-18MadPooC-LL
5203E8116333242D
2015-05-31mikrNF-PM1
B1=2780000, B2=91760000, E=12
2015-04-25snme2pm1NF
no factor from 2^64 to 2^65
2015-04-25snme2pm1NF
no factor from 2^63 to 2^64
2014-09-29JossNF-PM1
B1=174440
2014-06-09JossNF-PM1
B1=139179
2011-02-07Carsten KossendeyNF-PM1
B1=100000, B2=1675000, E=6
2011-01-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-09Architects CubedNF
no factor from 2^60 to 2^61