2 471 611 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 4 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
177955993	9	27.4	old
41330279143	11	35.3	2008-07-14 20:24:08
311304348673	12	38.2	2008-07-14 20:24:08
551861754625675073639021553607	30	98.8	2018-09-26 21:00:42

ECM

Digits	B1	Curves
25	50000	171 / 280

Estimated T-Level: 23.1 ⓘ

TF below 2^72 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-14	Oliver Kruse	4C9BF4D136602682	3	1150739	5	3
Verified (Factored)	2017-11-29	kkmrkkblmbrbk	4C9BF4D136602682	3	1402681	5	3
Verified	2018-09-28	rbanov	4C9BF4D136602682	4	828804	5	3

P-1 factors

Date	Factor	B1	B2
2018-09-26	551861754625675073639021553607	2000000	60000000

History

Date	User	Type	Result
2018-09-28	rbanov	C-PRP	M2471611/177955993/311304348673/41330279143/551861754625675073639021553607 : 4C9BF4D136602682 PRP: Verified PRP without proof (not generated)
2018-09-26	alpertron	F-PM1	Factor: 551861754625675073639021553607 / (P-1, B1=2000000, B2=60000000, E=12)
2017-11-29	kkmrkkblmbrbk	C-PRP	M2471611/177955993/311304348673/41330279143 : 4C9BF4D136602682 PRP: Verified PRP without proof (not generated)
2017-10-14	Oliver Kruse	C-PRP	M2471611/177955993/311304348673/41330279143 : 4C9BF4D136602682 PRP: Verified PRP without proof (not generated)
2008-07-14	George Woltman	F-ECM	Factor: 41330279143
2008-07-14	George Woltman	F-ECM	Factor: 311304348673