1 758 371 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
498231001038399003217	21	68.8	2008-07-31 13:43:45
659319980470633406174113	24	79.1	2019-08-01 01:59:27

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	103 / 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)		Ken Kriesel	3639D54EDDF210C0	0
Verified (Factored)	1998-12-21	Kent Lee	3639D54EDDF210C0	178370

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-03	Oliver Kruse	92BC817AF5FB6645	1	0	1	3
Verified (Factored)	2017-11-04	kkmrkkblmbrbk	92BC817AF5FB6645	1	590423	1	3
Verified	2019-08-18	ANONYMOUS	7BE2FADEC805F620	2	67521	5	3
Verified	2019-10-18	qq1010903229	7BE2FADEC805F620	2	1062623	5	3

History

Date	User	Type	Result
2019-10-18	qq1010903229	C-PRP	M1758371/498231001038399003217/659319980470633406174113 : 7BE2FADEC805F620 PRP: Verified PRP without proof (not generated)
2019-08-18	ANONYMOUS	C-PRP	M1758371/498231001038399003217/659319980470633406174113 : 7BE2FADEC805F620 PRP: Verified PRP without proof (not generated)
2019-08-01	Chang Chia-Tche	F-ECM	Factor: 659319980470633406174113 / (ECM curve 3, B1=50000, B2=5000000)
2017-11-04	kkmrkkblmbrbk	C-PRP	M1758371/498231001038399003217 : 92BC817AF5FB6645 PRP: Verified PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1758371/498231001038399003217 : 92BC817AF5FB6645 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-31	gribozavr	F-ECM	Factor: 498231001038399003217