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
1227649Factored
FactorDigitsBitsDate
154162369119515153692063.72009-10-07 15:31:46
ECM
DigitsB1Curves
2550000280 / 280
30250000104 / 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)Joel Armengaud121C0CECCB6FAAEE0
Verified (Factored)Simon Burge121C0CECCB6FAAEE0
Verified (Factored)apimac121C0CECCB6FAAEE0
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-29Oliver KruseC0CDB817B8A009ED1013
Verified2017-10-19kkmrkkblmbrbkC0CDB817B8A009ED19073313
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2017-10-19kkmrkkblmbrbkC-PRP
M1227649/15416236911951515369 : C0CDB817B8A009ED
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1227649/15416236911951515369 : C0CDB817B8A009ED
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12
2009-10-07SubPrimeF-ECM
Factor: 15416236911951515369
2009-02-15Sturle SundeNF
no factor from 2^60 to 2^61