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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Exponent Range:










MnStatusDetails
1325939Factored
FactorDigitsBitsDate
16658283195648418078323192580.52018-07-27 12:43:43
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)Ken Kriesel013BB723C3CB99840
Verified (Factored)Cornelius Caesar013BB723C3CB99840
Verified (Factored)Brian J. Beesley013BB723C3CB9984610980
Verified (Factored)2016-06-02MadPoo013BB723C3CB9984312825
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2018-07-28_p95holder_CDBDD4A1EAD01A7E1116945953
Verified2018-07-28Oliver KruseCDBDD4A1EAD01A7E146623953
History
DateUserTypeResult
2018-07-28Oliver KruseC-PRP
M1325939/1665828319564841807832319 : CDBDD4A1EAD01A7E
PRP: Verified
PRP without proof (not generated)
2018-07-28_p95holder_C-PRP
M1325939/1665828319564841807832319 : CDBDD4A1EAD01A7E
PRP: Verified
PRP without proof (not generated)
2018-07-27TJAOIF-ECM
Factor: 1665828319564841807832319 / (ECM curve 102, B1=50000, B2=5000000)
2018-05-19JossNF-PM1
B1=1325939, B2=132593900, E=12
2016-08-27Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-08-10Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-06-02MadPooC-LL
013BB723C3CB9984
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-28ramgeisNF
no factor from 2^65 to 2^66
2015-04-11snme2pm1NF
no factor from 2^64 to 2^65
2015-04-11snme2pm1NF
no factor from 2^63 to 2^64
2013-08-23David CampeauNF-PM1
B1=1330000, B2=38570000, E=12
2013-01-10dbaughNF
no factor from 2^62 to 2^63
2012-09-15AxelssonNF
no factor from 2^61 to 2^62
2009-02-19Sturle SundeNF
no factor from 2^60 to 2^61