4 918 601 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
7658775617154650489671	22	72.7	2014-10-12 16:49:09

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	Ken Burbank	A31D3D396FF3E4B5	0
Verified (Factored)	2000-04-05	Clifton Wood	A31D3D396FF3E4B5	1863568

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	1B4060ED2F86462B	1	0	1	3
Verified	2018-04-08	ATH	1B4060ED2F86462B	1	2990093	1	3

P-1 factors

Date	Factor	B1	B2
2014-10-12	7658775617154650489671	1200000	39750000

History

Date	User	Type	Result
2018-04-08	ATH	C-PRP	M4918601/7658775617154650489671 : 1B4060ED2F86462B PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4918601/7658775617154650489671 : 1B4060ED2F86462B PRP: Verified PRP without proof (not generated)
2014-10-12	mikr	F-PM1	Factor: 7658775617154650489671 / (P-1, B1=1200000, B2=39750000, E=12)
2011-09-11	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-07-13	Squeeky_Squirrel	NF-PM1	B1=60000, B2=960000, E=6
2010-03-31	Squeeky_Squirrel	NF	no factor from 2^61 to 2^62
2009-09-18	Carsten Kossendey	NF-PM1	B1=30000, B2=435000