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

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MnStatusDetails
2385121Factored
FactorDigitsBitsDate
28104347492413138650232271.32015-06-25 10:54:22
ECM
DigitsB1Curves
255000095 / 280
Estimated T-Level: 21.7
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Dennis Kluk2B3740BC2BF18D8B0
Verified (Factored)1999-04-23Bryan Fullerton2B3740BC2BF18D8B837470
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-13kkmrkkblmbrbkB5D90A4F66AA4B3C180789353
Verified2017-11-02Oliver KruseB5D90A4F66AA4B3C1122109553
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-02Oliver KruseC-PRP
M2385121/2810434749241313865023 : B5D90A4F66AA4B3C
PRP: Verified
PRP without proof (not generated)
2017-10-13kkmrkkblmbrbkC-PRP
M2385121/2810434749241313865023 : B5D90A4F66AA4B3C
PRP: Verified
PRP without proof (not generated)
2015-06-25guruF-ECM
Factor: 2810434749241313865023 / (ECM curve 2, B1=50000, B2=5000000)
2015-03-09VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-09VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-15-Anonymous-NF-PM1
B1=126910
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-06-01Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-26markrNF-PM1
B1=100000, B2=2075000, E=6
2010-11-15JossNF-PM1
B1=20000
2010-11-08JossNF-PM1
B1=15000
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61