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

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Exponent Range:










MnStatusDetails
1341619Factored
FactorDigitsBitsDate
19214605589838988705850167272890.62018-07-20 10:19:01
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Dennis Kluk3F427F49529FC38D0
Verified (Factored)Cornelius Caesar3F427F49529FC38D0
Verified (Factored)Brian J. Beesley3F427F49529FC38D813669
Verified (Factored)2016-06-02MadPoo3F427F49529FC38D403772
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-21Gabriel Lignelli49E2FB4CF8B06F0A1111641353
Verified2018-07-23_p95holder_49E2FB4CF8B06F0A149423853
History
DateUserTypeResult
2018-07-23_p95holder_C-PRP
M1341619/1921460558983898870585016727 : 49E2FB4CF8B06F0A
PRP: Verified
PRP without proof (not generated)
2018-07-21Gabriel LignelliC-PRP
M1341619/1921460558983898870585016727 : 49E2FB4CF8B06F0A
PRP: Verified
PRP without proof (not generated)
2018-07-20TJAOIF-ECM
Factor: 1921460558983898870585016727 / (ECM curve 37, B1=50000, B2=5000000)
2018-05-19JossNF-PM1
B1=1341619, B2=134161900, E=12
2016-08-27Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-08-11Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-06-02MadPooC-LL
3F427F49529FC38D
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-16ramgeisNF
no factor from 2^65 to 2^66
2015-04-13snme2pm1NF
no factor from 2^64 to 2^65
2015-04-13snme2pm1NF
no factor from 2^63 to 2^64
2013-08-24David CampeauNF-PM1
B1=1350000, B2=39150000, E=12
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-09-16AxelssonNF
no factor from 2^61 to 2^62
2009-02-22Sturle SundeNF
no factor from 2^60 to 2^61