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

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MnStatusDetails
4408517Factored
FactorDigitsBitsDate
337050789158869645782153410552053910355724943141.32021-08-10 17:25:57
ECM
DigitsB1Curves
255000012 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-03-31Eric Whitney06BC02FBBC8587A10
Verified (Factored)2000-04-12Lars Lindley06BC02FBBC8587A13163511
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-08-12/r/counting1C2EF57F9ADC724E1369143953
P-1 factors
DateFactorB1B2
2021-08-10337050789158869645782153410552053910355724910000000500000000
History
DateUserTypeResult
2021-08-12James HeinrichCERT
PRP Certification
Proof certified good
2021-08-12/r/countingC-PRP
M4408517/3370507891588696457821534105520539103557249 : 1C2EF57F9ADC724E
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-10axnF-PM1
Factor: 3370507891588696457821534105520539103557249 / (P-1, B1=10000000, B2=500000000)
2021-07-08TJAOINF
no factor from 2^68 to 2^69
2021-04-27Architects CubedNF-PM1
B1=1500000, B2=114000000
2021-04-24Architects CubedNF-PM1
B1=221000, B2=13427000
2018-06-19ramgeisNF
no factor from 2^67 to 2^68
2018-01-23BloodERazorNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-21snme2pm1NF
no factor from 2^65 to 2^66
2014-08-12lycornNF
no factor from 2^64 to 2^65
2014-08-12JayderNF
no factor from 2^63 to 2^64
2012-10-25Squeeky_SquirrelNF-PM1
B1=285000, B2=7267500, E=12
2012-02-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-07-06USAFSSNF-PM1
B1=50000, B2=787500, E=6
2010-10-30markrNF
no factor from 2^61 to 2^62