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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MnStatusDetails
2742073Factored
FactorDigitsBitsDate
6344464042601517055277168535533099.02016-11-06 20:05:00
ECM
DigitsB1Curves
255000018 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Marc Schmidt8D1A70320AC5137D0
Bad1999-07-27Tom Mossberg0B58F7DB4E8CA9392200215
Verified (Factored)1999-11-24TBWM8D1A70320AC5137D723633
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-20Oliver KruseBDDA08B8DBD9755E1202317353
Verified2017-12-05Chang Chia-TcheBDDA08B8DBD9755E118830853
P-1 factors
DateFactorB1B2
2016-11-06634446404260151705527716853553270000084000000
History
DateUserTypeResult
2017-12-05Chang Chia-TcheC-PRP
M2742073/634446404260151705527716853553 : BDDA08B8DBD9755E
PRP: Verified
PRP without proof (not generated)
2017-10-20Oliver KruseC-PRP
M2742073/634446404260151705527716853553 : BDDA08B8DBD9755E
PRP: Verified
PRP without proof (not generated)
2016-11-06mikrF-PM1
Factor: 634446404260151705527716853553 / (P-1, B1=2700000, B2=84000000, E=12)
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-03ramgeisNF
no factor from 2^65 to 2^66
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-10dbaughNF
no factor from 2^62 to 2^63
2012-04-06markrNF
no factor from 2^61 to 2^62
2011-04-29James HeinrichNF-PM1
B1=185000, B2=4625000, E=6
2011-01-21JossNF-PM1
B1=50000
2010-12-29JossNF-PM1
B1=30000
2010-12-19JossNF-PM1
B1=20000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61