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
1383583Factored
FactorDigitsBitsDate
999913686041184621762972376.42013-09-19 23:28:41
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 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 Kriesel3E1B3053CEABA6780
Verified (Factored)Bruce Mitchell3E1B3053CEABA6780
Verified (Factored)Cornelius Caesar3E1B3053CEABA6780
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30Oliver KruseC0850EF8C15307971013
Verified2017-10-25kkmrkkblmbrbkC0850EF8C1530797155168713
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2017-10-25kkmrkkblmbrbkC-PRP
M1383583/99991368604118462176297 : C0850EF8C1530797
PRP: Verified
PRP without proof (not generated)
2017-09-30Oliver KruseC-PRP
M1383583/99991368604118462176297 : C0850EF8C1530797
PRP: Verified
PRP without proof (not generated)
2013-09-19jim f in mnF-ECM
Factor: 99991368604118462176297
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-07-27Grant McCrackenNF
no factor from 2^61 to 2^62
2009-04-14Sturle SundeNF
no factor from 2^60 to 2^61