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
506171Factored
FactorDigitsBitsDate
565289434370836170600232375.62008-01-11 10:01:37
ECM
DigitsB1Curves
2550000280 / 280
30250000218 / 640
Estimated T-Level: 26.7
TF below 2^84 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-27Oliver Kruse32DA7A0FCA82ECE71013
Verified2017-09-28Oliver Kruse32DA7A0FCA82ECE71013
Verified2017-11-09kkmrkkblmbrbk32DA7A0FCA82ECE717391713
Unverified (Reliable)2020-04-19Oliver Kruse6E1250668E07B1__136518253
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2021-05-18gLaussNF-PP1
Start=2/7, B1=5000000, B2=365000000
2021-05-18gLaussNF-PM1
B1=10000000, B2=830000000
2020-04-19Oliver KruseC-PRP
M506171/56528943437083617060023 : 6E1250668E07B1__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M506171/56528943437083617060023 : 32DA7A0FCA82ECE7
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M506171/56528943437083617060023 : 32DA7A0FCA82ECE7
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M506171/56528943437083617060023 : 32DA7A0FCA82ECE7
PRP: Unverified (Reliable)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=1500000, B2=50000000, E=12
2008-01-11Team_BunduF-ECM
Factor: 56528943437083617060023