Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
1718203Factored
FactorDigitsBitsDate
1129447709730566421207772476.62011-12-02 16:41:24
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)John LyonA98556344EC85F500
Verified (Factored)1998-12-13Paul Victor NovareseA98556344EC85F50326399
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertronD4C652E09524528A1013
Verified2017-10-19Oliver KruseD4C652E09524528A1973413
History
DateUserTypeResult
2022-03-08LordJuliusNF
no factor from 2^58 to 2^60
2017-10-19Oliver KruseC-PRP
M1718203/112944770973056642120777 : D4C652E09524528A
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1718203/112944770973056642120777 : D4C652E09524528A
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2011-12-02Dmitry B. KhachaturovF-ECM
Factor: 112944770973056642120777
2011-02-11Carsten KossendeyNF-PM1
B1=90000, B2=1507500, E=6
2010-10-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-23Architects CubedNF
no factor from 2^60 to 2^61