4 685 531 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
17977488802145620151	20	64.0	2013-08-07 22:06:10

ECM

Digits	B1	Curves
25	50000	3 / 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)	1998-05-08	Alan Vidmar	5DD619BA8E7115B3	0
Verified (Factored)	2000-03-01	Hoang Anh Vo	5DD619BA8E7115B3	1021906

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	D2767BF815564E5C	1	0	1	3
Verified	2018-03-08	Cubox	D2767BF815564E5C	1	4046273	1	3

P-1 factors

Date	Factor	B1	B2
2013-08-07	17977488802145620151	145000	2972500

History

Date	User	Type	Result
2024-08-18	cramsey87	NF-PM1	B1=1400000, B2=1205424990
2018-03-08	Cubox	C-PRP	M4685531/17977488802145620151 : D2767BF815564E5C PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4685531/17977488802145620151 : D2767BF815564E5C PRP: Verified PRP without proof (not generated)
2013-08-07	Squeeky_Squirrel	F	Factor: 17977488802145620151
2011-12-11	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-07-05	markr	NF	no factor from 2^61 to 2^62
2009-09-11	Carsten Kossendey	NF-PM1	B1=25000, B2=381250