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
406361Factored
FactorDigitsBitsDate
4663968325524739786529295772788.62019-04-22 05:34:15
ECM
DigitsB1Curves
2550000280 / 280
30250000337 / 640
Estimated T-Level: 27.6 ⓘ
TF below 2^87 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski22DA0
Verified (Factored)Curtis Scott7CFBA3A7A2E722DA0
Verified (Factored)Eivind Triel7CFBA3A7A2E722DA67884
Verified (Factored)2002-02-03Dennis Pope7CFBA3A7A2E722DA394994
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-04-23J.R. AllenA8FA969D7879F85B139012253
Verified2019-04-23kkmrkkblmbrbkA8FA969D7879F85B122900853
Verified2019-04-23matzetoniA8FA969D7879F85B11603753
History
DateUserTypeResult
2019-04-23matzetoniC-PRP
M406361/466396832552473978652929577 : A8FA969D7879F85B
PRP: Verified
PRP without proof (small exponent)
2019-04-23kkmrkkblmbrbkC-PRP
M406361/466396832552473978652929577 : A8FA969D7879F85B
PRP: Verified
PRP without proof (small exponent)
2019-04-23J.R. AllenC-PRP
M406361/466396832552473978652929577 : A8FA969D7879F85B
PRP: Verified
PRP without proof (small exponent)
2019-04-22alexF-ECM
Factor: 466396832552473978652929577 / (ECM curve 87, B1=250000, B2=25000000, Sigma=1988958403448117)
2018-11-30Gordon SpenceNF
no factor from 2^65 to 2^66
2017-12-14Gordon SpenceNF
no factor from 2^64 to 2^65
2016-09-06JossNF-PM1
B1=10000000, B2=720000000, E=12
2016-06-22JossNF-PM1
B1=10000000, B2=360000000, E=12
2016-05-12JossNF-PM1
B1=10000000, B2=180000000, E=12
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-11-08Gordon SpenceNF
no factor from 2^63 to 2^64
2015-11-08Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-14NRNF
no factor from 2^61 to 2^62
2011-05-04Sid & AndyNF
no factor from 2^60 to 2^61
2010-05-24James HintzNF-PM1
B1=5000000, B2=140000000, E=12