399 173 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
1684486848903684774615159377	28	90.4	2019-04-18 07:24:00

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	472 / 640

Estimated T-Level: 28.7 ⓘ

TF below 2^90 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	5C26	0
Verified (Factored)		Vincent J. Mooney	7E79364123575C26	0
Verified (Factored)		Klaus Kastens	7E79364123575C26	0
Verified (Factored)		Eivind Triel	7E79364123575C26	58639
Verified (Factored)	2016-06-01	MadPoo	7E79364123575C26	52273

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-19	trebor	25BF9D3DC23075FA	1	43558	5	3
Verified	2019-04-19	ATH	25BF9D3DC23075FA	1	187802	5	3
Verified	2019-04-19	matzetoni	25BF9D3DC23075FA	1	270037	5	3

History

Date	User	Type	Result
2022-11-15	LordJulius	NF	no factor from 2^67 to 2^68
2022-11-15	LordJulius	NF	no factor from 2^66 to 2^67
2019-05-02	Gordon Spence	NF	no factor from 2^65 to 2^66
2019-04-19	matzetoni	C-PRP	M399173/1684486848903684774615159377 : 25BF9D3DC23075FA PRP: Verified PRP without proof (small exponent)
2019-04-19	ATH	C-PRP	M399173/1684486848903684774615159377 : 25BF9D3DC23075FA PRP: Verified PRP without proof (small exponent)
2019-04-19	trebor	C-PRP	M399173/1684486848903684774615159377 : 25BF9D3DC23075FA PRP: Verified PRP without proof (small exponent)
2019-04-18	alex	F-ECM	Factor: 1684486848903684774615159377 / (ECM curve 222, B1=250000, B2=25000000, Sigma=7135009211141373)
2018-01-11	BloodERazor	NF	no factor from 2^64 to 2^65
2017-01-23	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2016-06-01	MadPoo	C-LL	7E79364123575C26
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^52
2015-11-20	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-20	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2012-07-18	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-11-13	lycorn	NF	no factor from 2^60 to 2^61
2009-01-09	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-06	Sturle Sunde	NF	no factor from 2^58 to 2^59