3 387 311 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
6774623	7	22.7	old
491356559039	12	38.8	2008-09-07 19:48:51

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-11-05	kkmrkkblmbrbk	924E0FCA2F742D25	2	1180574	5	3
Verified	2017-11-20	Oliver Kruse	924E0FCA2F742D25	2	886474	5	3

History

Date	User	Type	Result
2022-08-16	Joss	NF-PM1	B1=3387311, B2=368560500
2021-12-29	Joss	NF-PM1	B1=3387311, B2=111907950
2021-12-28	Joss	NF-PM1	B1=3387311
2021-10-24	Joss	NF	no factor from 2^67 to 2^68
2021-03-14	Joss	NF-PM1	B1=338731, B2=7113353, E=6
2021-03-14	Joss	NF-PM1	B1=338731, B2=3726042, E=6
2017-11-20	Oliver Kruse	C-PRP	M3387311/6774623/491356559039 : 924E0FCA2F742D25 PRP: Verified PRP without proof (not generated)
2017-11-05	kkmrkkblmbrbk	C-PRP	M3387311/6774623/491356559039 : 924E0FCA2F742D25 PRP: Verified PRP without proof (not generated)
2008-09-07	Will Edgington	F	Factor: 491356559039