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
386047Factored
FactorDigitsBitsDate
416810922800327752312065.22007-08-30 07:48:09
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6 ⓘ
TF below 2^83 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
BadMarc-Etienne VargenauAEC0E290CA064EED0
Verified (Factored)2015-08-11MadPoo86746A544DA1D389211556
Verified (Factored)2015-08-11MadPoo86746A544DA1D389358222
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-23Oliver KruseE98287C50096772F1013
Verified2017-11-02kkmrkkblmbrbkE98287C50096772F135239813
Unverified (Reliable)2020-04-18Oliver KruseD075EADC70CF0B__13967953
History
DateUserTypeResult
2024-02-19Denial140NF-PM1
B1=1000000, B2=2443564200
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-18Oliver KruseC-PRP
M386047/41681092280032775231 : D075EADC70CF0B__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-02kkmrkkblmbrbkC-PRP
M386047/41681092280032775231 : E98287C50096772F
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M386047/41681092280032775231 : E98287C50096772F
PRP: Unverified (Reliable)
PRP without proof (not generated)
2015-08-11MadPooC-LL
86746A544DA1D389
2015-08-11MadPooC-LL
86746A544DA1D389
2007-08-30Team_BunduF-ECM
Factor: 41681092280032775231