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

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MnStatusDetails
9906289Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
7747759333558278053324232479.42022-05-09 19:41:30
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2000-05-24Werner GeuensCBB9DF9D6A868B658304112
Verified (Factored)2003-08-25Marc Getty / Phil FizurCBB9DF9D6A868B653914934
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-05-15XZT3A539772168F41251707689253
P-1 factors
DateFactorB1B2
2022-05-0977477593335582780533242320000004219343700
History
DateUserTypeResult
2022-05-15MaxxBotCERT
PRP Certification
Proof certified good
2022-05-15XZTC-PRP
M9906289/774775933355827805332423 : 3A539772168F4125
PRP proof power = 8
PRP: Verified
Proof certified good
2022-05-09ThaF-PM1
Factor: 774775933355827805332423 / (P-1, B1=2000000, B2=4219343700)
2021-10-21SRBaseNF
no factor from 2^71 to 2^72
2021-08-18SRBaseNF
no factor from 2^70 to 2^71
2020-11-01chuenkitNF
no factor from 2^69 to 2^70
2019-09-06TJAOINF
no factor from 2^68 to 2^69
2019-01-09USAFSSNF-PM1
B1=570000, B2=17955000, E=12
2017-05-10snme2pm1NF
no factor from 2^67 to 2^68
2015-10-23mikrNF
no factor from 2^66 to 2^67
2015-04-21VictordeHollanderNF
no factor from 2^65 to 2^66
2013-08-22NesowaNF
no factor from 2^64 to 2^65
2013-04-05NesowaNF-PM1
B1=120000, B2=2370000, E=6
2009-05-24Carsten KossendeyNF-PM1
B1=55000, B2=880000, E=6