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
4222051Factored
FactorDigitsBitsDate
1179789045683977988670892476.62022-04-15 13:20:15
ECM
DigitsB1Curves
255000012 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Stephen Wood9CE845DDA932A5030
Verified (Factored)2001-04-21Ryan Smith9CE845DDA932A5032848778
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-04-21XZT34B1F31D71A6BF311177228553
P-1 factors
DateFactorB1B2
2022-04-151179789045683977988670891370000094554229770
History
DateUserTypeResult
2022-04-21curtiscCERT
PRP Certification
Proof certified good
2022-04-21XZTC-PRP
M4222051/117978904568397798867089 : 34B1F31D71A6BF31
PRP proof power = 7
PRP: Verified
Proof certified good
2022-04-15DRobinsonPEF-PM1
Factor: 117978904568397798867089 / (P-1, B1=13700000, B2=94554229770)
2021-05-05KingNF-PM1
B1=1600000, B2=60000000, E=12
2021-01-24-Anonymous-NF
no factor from 2^71 to 2^72
2021-01-24-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-23-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-23-Anonymous-NF
no factor from 2^68 to 2^69
2018-11-12chuenkitNF
no factor from 2^67 to 2^68
2017-12-27YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-08snme2pm1NF
no factor from 2^65 to 2^66
2013-12-03David CampeauNF
no factor from 2^64 to 2^65
2013-11-18JayderNF
no factor from 2^63 to 2^64
2013-07-21Squeeky_SquirrelNF-PM1
B1=130000, B2=2567500, E=6
2012-01-31GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-01-26markrNF
no factor from 2^61 to 2^62