2 219 999 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
4941713319225686657	19	62.1	2009-01-10 20:02:26

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	188 / 640

Estimated T-Level: 26.5 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Linton	5AD3A3494B116500	0
Verified (Factored)	1999-02-14	David Phillips	5AD3A3494B116500	2087655

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-12	kkmrkkblmbrbk	996BFC5FB193BA15	1	1951129	5	3
Verified	2017-10-27	Oliver Kruse	996BFC5FB193BA15	1	1919399	5	3

History

Date	User	Type	Result
2017-10-27	Oliver Kruse	C-PRP	M2219999/4941713319225686657 : 996BFC5FB193BA15 PRP: Verified PRP without proof (not generated)
2017-10-12	kkmrkkblmbrbk	C-PRP	M2219999/4941713319225686657 : 996BFC5FB193BA15 PRP: Verified PRP without proof (not generated)
2016-04-29	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2009-01-10	Luigi Morelli	F-ECM	Factor: 4941713319225686657