6 177 397 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
12172409083918751783771833	26	83.3	2019-08-28 04:14:07

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)	1999-05-09	Christopher G. Lewis	3913F1D14F10D3B9	544871
Verified (Factored)	2001-01-28	King Butler	3913F1D14F10D3B9	5657080

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-08-29	trebor	0E076CC6497168A1	1	1673756	5	3
Verified	2019-08-30	marssystems	0E076CC6497168A1	1	2656435	5	3

P-1 factors

Date	Factor	B1	B2
2019-08-28	12172409083918751783771833	600000	12000000

History

Date	User	Type	Result
2019-08-30	marssystems	C-PRP	M6177397/12172409083918751783771833 : 0E076CC6497168A1 PRP: Verified PRP without proof (not generated)
2019-08-29	trebor	C-PRP	M6177397/12172409083918751783771833 : 0E076CC6497168A1 PRP: Verified PRP without proof (not generated)
2019-08-28	takahashi	F-PM1	Factor: 12172409083918751783771833 / (P-1, B1=600000, B2=12000000, E=12)
2018-05-30	ramgeis	NF	no factor from 2^67 to 2^68
2016-04-13	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-10-09	Bruno Victal	NF	no factor from 2^65 to 2^66
2014-09-18	monst	NF	no factor from 2^64 to 2^65
2014-09-10	Nesowa	NF	no factor from 2^63 to 2^64
2013-03-24	Squeeky_Squirrel	NF-PM1	B1=115000, B2=2242500, E=6