2 450 599 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
16491710621307611177	20	63.8	2015-02-27 20:41:07

ECM

Digits	B1	Curves
25	50000	185 / 280

Estimated T-Level: 23.3 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Gary Hanson	645022E077672985	0
Verified (Factored)	1999-03-15	Kai-ming Poon	645022E077672985	2237218

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-13	Oliver Kruse	651E0289F7B7900E	1	512530	5	3
Verified	2017-11-28	kkmrkkblmbrbk	651E0289F7B7900E	1	2241213	5	3

History

Date	User	Type	Result
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-28	kkmrkkblmbrbk	C-PRP	M2450599/16491710621307611177 : 651E0289F7B7900E PRP: Verified PRP without proof (not generated)
2017-10-13	Oliver Kruse	C-PRP	M2450599/16491710621307611177 : 651E0289F7B7900E PRP: Verified PRP without proof (not generated)
2015-02-27	VictordeHollander	F	Factor: 16491710621307611177 / TF: 63-64
2014-01-31	mikr	NF-PM1	B1=1172000, B2=48000000, E=12
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-07	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-18	Oscar Östlin	NF-PM1	B1=95000, B2=1947500, E=6
2010-12-15	Joss	NF-PM1	B1=20000
2009-01-14	Sturle Sunde	NF	no factor from 2^60 to 2^61