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

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MnStatusDetails
1815533Factored
FactorDigitsBitsDate
159396051834356645624232373.82020-04-29 14:58:45
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)Michael J. Kilfoyle64AB9BFE609149480
Verified (Factored)1998-12-13Stephen Hinton64AB9BFE609149481704380
Verified (Factored)2015-07-18MadPoo64AB9BFE609149481756868
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-04-29atrenchAFEF62996B35FC281118593653
Verified2020-04-30Klaus NordmannAFEF62996B35FC28126147753
History
DateUserTypeResult
2020-04-30Klaus NordmannC-PRP
M1815533/15939605183435664562423 : AFEF62996B35FC28
PRP: Verified
PRP without proof (not generated)
2020-04-29atrenchC-PRP
M1815533/15939605183435664562423 : AFEF62996B35FC28
PRP: Verified
PRP without proof (not generated)
2020-04-29mnd9F-ECM
Factor: 15939605183435664562423 / (ECM curve 1, B1=50000, B2=5000000, Sigma=7940879178121091)
2019-06-24TJAOINF
no factor from 2^67 to 2^68
2018-09-10JossNF-PM1
B1=1815533, B2=181553300, E=12
2018-03-19TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-02ramgeisNF
no factor from 2^65 to 2^66
2015-07-18MadPooC-LL
64AB9BFE60914948
2015-05-23mikrNF-PM1
B1=2780000, B2=91760000, E=12
2015-04-23snme2pm1NF
no factor from 2^64 to 2^65
2015-04-23snme2pm1NF
no factor from 2^63 to 2^64
2014-09-22JossNF-PM1
B1=170706
2014-05-13JossNF-PM1
B1=135353
2011-02-11Carsten KossendeyNF-PM1
B1=100000, B2=1650000, E=6
2011-01-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-17Architects CubedNF
no factor from 2^60 to 2^61