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

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MnStatusDetails
2912779Factored
FactorDigitsBitsDate
17977629201311765198472270.62021-03-19 22:34:44
ECM
DigitsB1Curves
255000069 / 280
Estimated T-Level: 21.2 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Mikael LehikoinenAF90A8E0EFDBE6DF0
Verified (Factored)1999-08-07vincent chaoAF90A8E0EFDBE6DF782947
Verified (Factored)2018-10-03kkmrkkblmbrbkAF90A8E0EFDBE6DF679620
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-03-23volki68DB4ED45CE30CC21161125153
History
DateUserTypeResult
2021-03-23Ben DeloCERT
PRP Certification
Proof certified good
2021-03-23volkiC-PRP
M2912779/1797762920131176519847 : 68DB4ED45CE30CC2
PRP proof power = 7
PRP: Verified
Proof certified good
2021-03-19mnd9F-ECM
Factor: 1797762920131176519847 / (ECM curve 6, B1=50000, B2=5000000, Sigma=3487245899917806)
2020-03-30masserNF-PM1
B1=5000000, B2=200000000, E=12
2018-12-17chuenkitNF
no factor from 2^67 to 2^68
2018-10-03kkmrkkblmbrbkC-LL
AF90A8E0EFDBE6DF
2017-11-19Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-22ramgeisNF
no factor from 2^65 to 2^66
2015-04-25VictordeHollanderNF-PM1
B1=1000000, B2=20000000, E=12
2015-04-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-25VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-12-18Grant McCrackenNF
no factor from 2^61 to 2^62
2011-01-26markrNF-PM1
B1=105000, B2=2283750, E=6
2010-12-24JossNF-PM1
B1=20000
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=168750
2009-02-14Sturle SundeNF
no factor from 2^60 to 2^61