2 448 713 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
2938152555535310551090921	25	81.3	2010-03-10 14:14:41

ECM

Digits	B1	Curves
25	50000	87 / 280

Estimated T-Level: 21.6 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Rex Patrick	54497A7D43CC9E58	0
Verified (Factored)	1999-05-30	Will Carroll	54497A7D43CC9E58	414896

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-13	Oliver Kruse	5A5FA5418C5703AD	1	1972936	5	3
Verified	2017-11-28	kkmrkkblmbrbk	5A5FA5418C5703AD	1	139454	5	3

Assigned

Assigned	User	Work Type	Stage	% Done	Updated	Expired
2025-10-12	debrouxl	factor ECM small		0.00 %	2025-10-13

History

Date	User	Type	Result
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2019-02-05	Joss	NF-PM1	B1=1000000
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-28	kkmrkkblmbrbk	C-PRP	M2448713/2938152555535310551090921 : 5A5FA5418C5703AD PRP: Verified PRP without proof (not generated)
2017-10-13	Oliver Kruse	C-PRP	M2448713/2938152555535310551090921 : 5A5FA5418C5703AD PRP: Verified PRP without proof (not generated)
2010-03-10	James Classen	F-ECM	Factor: 2938152555535310551090921
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61