1 873 367 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
1075780999751	13	40.0	old
2001389154047	13	40.9	2008-07-15 07:47:40
1892814501437016236897	22	70.7	2019-11-09 05:56:05

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	CA6868C23B4A9560	2	0	1	3
Verified (Factored)	2017-11-07	Chang Chia-Tche	CA6868C23B4A9560	2	1801281	1	3
Verified	2019-11-12	fre_games	07C3EE36A45ABD17	3	988997	5	3
Verified	2019-11-12	ATH	07C3EE36A45ABD17	3	176700	5	3

History

Date	User	Type	Result
2019-11-12	ATH	C-PRP	M1873367/1075780999751/2001389154047/1892814501437016236897 : 07C3EE36A45ABD17 PRP: Verified PRP without proof (not generated)
2019-11-12	fre_games	C-PRP	M1873367/1075780999751/2001389154047/1892814501437016236897 : 07C3EE36A45ABD17 PRP: Verified PRP without proof (not generated)
2019-11-09	Chang Chia-Tche	F-ECM	Factor: 1892814501437016236897 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-07	Chang Chia-Tche	C-PRP	M1873367/1075780999751/2001389154047 : CA6868C23B4A9560 PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1873367/1075780999751/2001389154047 : CA6868C23B4A9560 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-15	J Feitsma	F	Factor: 2001389154047