1 597 763 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
83779089587232177407	20	66.2	2013-11-29 04:16:01
384313023197306174617	21	68.4	2019-09-02 12:32:28

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Kurt Steinkraus	FC87F11AFF899EE7	0
Verified (Factored)		Ted Loucks	FC87F11AFF899EE7	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-02	Oliver Kruse	B74B6C2A4C77F56D	1	0	1	3
Verified (Factored)	2017-10-31	kkmrkkblmbrbk	B74B6C2A4C77F56D	1	506390	1	3
Verified	2019-09-03	mnd9	1F703B914293193D	2	202060	5	3
Verified	2019-09-03	ATH	1F703B914293193D	2	822179	5	3

P-1 factors

Date	Factor	B1	B2
2013-11-29	83779089587232177407	980000	28420000

History

Date	User	Type	Result
2019-09-03	ATH	C-PRP	M1597763/83779089587232177407/384313023197306174617 : 1F703B914293193D PRP: Verified PRP without proof (not generated)
2019-09-03	mnd9	C-PRP	M1597763/83779089587232177407/384313023197306174617 : 1F703B914293193D PRP: Verified PRP without proof (not generated)
2019-09-02	TJAOI	F-ECM	Factor: 384313023197306174617 / (ECM curve 84, B1=50000, B2=5000000)
2017-10-31	kkmrkkblmbrbk	C-PRP	M1597763/83779089587232177407 : B74B6C2A4C77F56D PRP: Verified PRP without proof (not generated)
2017-10-02	Oliver Kruse	C-PRP	M1597763/83779089587232177407 : B74B6C2A4C77F56D PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2013-11-29	David Campeau	F-PM1	Factor: 83779089587232177407
2011-02-05	James Heinrich	NF-PM1	B1=85000, B2=1445000, E=6
2010-07-04	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-05-10	Architects Cubed	NF	no factor from 2^60 to 2^61