39 743 941 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷³

TF target 2⁷²

P-1

B1 =	555000
B2 =	11516250

Status	Date	User	Residue	Shift	Software
Verified	2007-10-17	C. Cooper / S. Boone	5F81A517FF362B53	39196213	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2017-04-13	Dubslow	5F81A517FF362B53	39154136	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-30	LaurV	NF	no factor TF: 68-69
2019-10-11	-anonymous-	NF	no factor TF: 72-73
2019-08-18	Architects Cubed	NF-PM1	B1=555000, B2=11516250, E=12
2019-07-31	monst	NF	no factor TF: 71-72
2017-04-13	Dubslow	C-LL	5F81A517FF362B53
2014-12-15	NickOfTime	NF	no factor TF: 70-71
2014-12-09	Mark Rose	NF	no factor TF: 69-70
2013-10-04	Carsten Kossendey	NF	no factor TF: 68-69
2007-10-17	curtisc	C-LL	5F81A517FF362B53
2007-09-13	curtisc	NF-PM1	B1=640000
2006-11-09	ANONYMOUS	NF	no factor TF: 1-68