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

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MnStatusDetails
3778997Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
30231977824.8old
840373352871136.32008-09-07 21:12:00
29354056316936903771961.32016-04-20 11:48:24
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
Verified2017-09-20kkmrkkblmbrbkE8B8A3F943552A6F3013
Verified2017-12-08Oliver KruseE8B8A3F943552A6F3116139713
History
DateUserTypeResult
2022-09-27JossNF-PM1
B1=1000000, B2=130364850
2022-06-17LordJuliusNF
no factor from 2^66 to 2^67
2022-06-17LordJuliusNF
no factor from 2^65 to 2^66
2022-06-17LordJuliusNF
no factor from 2^64 to 2^65
2022-06-17LordJuliusNF
no factor from 2^63 to 2^64
2022-06-17LordJuliusNF
no factor from 2^62 to 2^63
2022-05-03JossNF-PM1
B1=500000, B2=130364850
2022-04-18JossNF-PM1
B1=300000
2022-03-10JossNF
no factor from 2^67 to 2^68
2017-12-08Oliver KruseC-PRP
M3778997/30231977/84037335287/2935405631693690377 : E8B8A3F943552A6F
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M3778997/2935405631693690377/30231977/84037335287 : E8B8A3F943552A6F
PRP: Verified
PRP without proof (not generated)
2016-04-20TJAOIF
Factor: 2935405631693690377 / TF: 61-62
2008-09-07Will EdgingtonF
Factor: 84037335287