Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
822721Factored
FactorDigitsBitsDate
3879693660904715011423612478.42016-06-16 23:01:50
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 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)David Slowinski320E0
Verified (Factored)Paul Victor Novarese9699DF93AEC6F20E0
Verified (Factored)Marco Negrazus9699DF93AEC6F20E0
Verified (Factored)2015-04-11MadPoo9699DF93AEC6F20E615269
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-28Oliver Kruse21FDE38D63FF1BD11013
Verified2017-10-14Oliver Kruse21FDE38D63FF1BD1135851313
Verified2017-12-18ATH21FDE38D63FF1BD1168733113
Unverified (Reliable)2020-04-21Oliver Kruse786D1932623F4C__169819153
History
DateUserTypeResult
2020-04-21Oliver KruseC-PRP
M822721/387969366090471501142361 : 786D1932623F4C__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-18ATHC-PRP
M822721/387969366090471501142361 : 21FDE38D63FF1BD1
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-14Oliver KruseC-PRP
M822721/387969366090471501142361 : 21FDE38D63FF1BD1
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M822721/387969366090471501142361 : 21FDE38D63FF1BD1
PRP: Unverified (Reliable)
PRP without proof (not generated)
2016-06-16f0rteOCF-ECM
Factor: 387969366090471501142361
2016-02-23lycornNF
no factor from 2^64 to 2^65
2015-11-26Sid & AndyNF-PM1
B1=8227210, B2=246816300, E=12
2015-09-28Gordon SpenceNF
no factor from 2^63 to 2^64
2015-09-28Gordon SpenceNF
no factor from 2^62 to 2^63
2015-04-11MadPooC-LL
9699DF93AEC6F20E
2015-02-27TJAOINF
no factor from 2^61 to 2^62
2013-11-02David CampeauNF-PM1
B1=1670000, B2=56780000, E=12
2012-09-21JossNF-PM1
B1=1645442
2010-06-01Architects CubedNF
no factor from 2^60 to 2^61
2008-10-29markrNF-PM1
B1=1000000, B2=40000000, E=12
2008-10-26markrNF-PM1
B1=1000000, B2=20000000, E=12
2008-10-14Sturle SundeNF
no factor from 2^59 to 2^60
2008-10-14Sturle SundeNF
no factor from 2^58 to 2^59