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

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MnStatusDetails
4683121Factored
FactorDigitsBitsDate
5145555969218067396053636111104818529627341135.22023-03-05 19:47:25
ECM
DigitsB1Curves
25500009 / 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)1999-06-26Gordon CrossD755AC77C9A12A614455129
Verified (Factored)2000-01-25robbie DeightonD755AC77C9A12A613096716
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2023-03-11kracker8600B58C5B1DC4071237108253
P-1 factors
DateFactorB1B2
2023-03-0551455559692180673960536361111048185296273430000011204171550
History
DateUserTypeResult
2023-03-11curtiscCERT
PRP Certification
Proof certified good
2023-03-11krackerC-PRP
M4683121/51455559692180673960536361111048185296273 : 8600B58C5B1DC407
PRP proof power = 7
PRP: Verified
Proof certified good
2023-03-05Sid & AndyF-PM1
Factor: 51455559692180673960536361111048185296273 / (P-1, B1=4300000, B2=11204171550)
2021-11-03Aaron HavilandNF-PM1
B1=480000, B2=14400000, e=12
2021-03-23-Anonymous-NF
no factor from 2^71 to 2^72
2021-03-22-Anonymous-NF
no factor from 2^70 to 2^71
2021-03-22-Anonymous-NF
no factor from 2^69 to 2^70
2021-03-22-Anonymous-NF
no factor from 2^68 to 2^69
2018-10-10YxinityNF
no factor from 2^67 to 2^68
2018-06-03BloodERazorNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-09snme2pm1NF
no factor from 2^65 to 2^66
2015-02-17monstNF
no factor from 2^64 to 2^65
2015-02-17JayderNF
no factor from 2^63 to 2^64
2013-08-05Squeeky_SquirrelNF-PM1
B1=145000, B2=2972500, E=6
2011-12-11GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-07-08markrNF
no factor from 2^61 to 2^62
2009-09-14Carsten KossendeyNF-PM1
B1=25000, B2=381250