2 176 171 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
1675053184430659249	19	60.5	2009-01-05 00:22:52
25561685545690607187359	23	74.4	2009-01-04 01:40:31

ECM

Digits	B1	Curves
25	50000	95 / 280

Estimated T-Level: 21.7 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		phil kenny	9903D3C651CFCD60	0
Verified (Factored)		Bo Asklund	9903D3C651CFCD60	0
Verified (Factored)	1999-03-01	Jakob Trier	9903D3C651CFCD60	1998307

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-10	kkmrkkblmbrbk	83E1F160ADA6429B	2	0	1	3
Verified	2017-10-23	Oliver Kruse	83E1F160ADA6429B	2	1719621	1	3

History

Date	User	Type	Result
2017-10-23	Oliver Kruse	C-PRP	M2176171/25561685545690607187359/1675053184430659249 : 83E1F160ADA6429B PRP: Verified PRP without proof (not generated)
2017-10-10	kkmrkkblmbrbk	C-PRP	M2176171/25561685545690607187359/1675053184430659249 : 83E1F160ADA6429B PRP: Verified PRP without proof (not generated)
2016-03-15	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2009-01-05	Sturle Sunde	F	Factor: 1675053184430659249
2009-01-04	SubPrime	F-ECM	Factor: 25561685545690607187359