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

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MnStatusDetails
3437227Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
667715717031136.0old
1446660099771237.12008-09-07 19:49:12
177332619940927671754.02014-10-24 11:28:53
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-04kkmrkkblmbrbk0F89265A0252EC623013
Verified2017-11-22Oliver Kruse0F89265A0252EC623221978513
History
DateUserTypeResult
2022-09-05JossNF-PM1
B1=1150000, B2=213444000
2022-05-06LordJuliusNF
no factor from 2^66 to 2^67
2022-05-06LordJuliusNF
no factor from 2^65 to 2^66
2022-05-06LordJuliusNF
no factor from 2^64 to 2^65
2022-05-06LordJuliusNF
no factor from 2^63 to 2^64
2022-05-06LordJuliusNF
no factor from 2^62 to 2^63
2022-01-06JossNF-PM1
B1=1150000, B2=111642300
2021-10-17JossNF
no factor from 2^68 to 2^69
2021-09-06JossNF
no factor from 2^67 to 2^68
2020-11-22JossNF-PM1
B1=343722, B2=3437227, E=6
2017-11-22Oliver KruseC-PRP
M3437227/66771571703/144666009977/17733261994092767 : 0F89265A0252EC62
PRP: Verified
PRP without proof (not generated)
2017-10-04kkmrkkblmbrbkC-PRP
M3437227/66771571703/144666009977/17733261994092767 : 0F89265A0252EC62
PRP: Verified
PRP without proof (not generated)
2014-10-24TJAOIF
Factor: 17733261994092767 / TF: 53-54
2008-09-07Will EdgingtonF
Factor: 144666009977