4 958 579 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
62350348114926943683921579659407	32	105.6	2015-03-27 21:29:19

ECM

Digits	B1	Curves
25	50000	6 / 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	Shift
Verified (Factored)	1998-06-14	stuart johnson	7309A67C354C07A4	0
Verified (Factored)	2001-06-03	Wojciech Florek	7309A67C354C07A4	65892

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	A22E0848221C6B17	1	0	1	3
Verified	2018-04-18	GdS	A22E0848221C6B17	1	3931217	1	3

P-1 factors

Date	Factor	B1	B2
2015-03-27	62350348114926943683921579659407	1200000	43100000

History

Date	User	Type	Result
2018-04-18	GdS	C-PRP	M4958579/62350348114926943683921579659407 : A22E0848221C6B17 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4958579/62350348114926943683921579659407 : A22E0848221C6B17 PRP: Verified PRP without proof (not generated)
2015-03-27	mikr	F-PM1	Factor: 62350348114926943683921579659407 / (P-1, B1=1200000, B2=43100000, E=12)
2015-01-02	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-02	VictordeHollander	NF	no factor from 2^63 to 2^64
2011-09-11	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2009-12-23	markr	NF	no factor from 2^61 to 2^62
2009-12-05	markr	NF-PM1	B1=75000, B2=1500000, E=6