39 588 551 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 =	550000
B2 =	11550000

Status	Date	User	Residue	Shift	Software
Verified	2007-10-17	Brandon Harris	2400D7DB8ACA0351	27111578	Windows,Prime95,v25 beta,(aka Wd1)
Verified	2017-03-15	Dubslow	2400D7DB8ACA0351	1036174	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-30	LaurV	NF	no factor TF: 68-69
2022-05-17	Sid & Andy	NF	no factor TF: 72-73
2019-07-15	Architects Cubed	NF-PM1	B1=550000, B2=11550000, E=12
2019-06-07	monst	NF	no factor TF: 71-72
2017-03-15	Dubslow	C-LL	2400D7DB8ACA0351
2014-12-12	ktony	NF	no factor TF: 70-71
2014-12-08	Bdot	NF	no factor TF: 69-70
2013-10-01	Carsten Kossendey	NF	no factor TF: 68-69
2007-10-17	BranMuffin	C-LL	2400D7DB8ACA0351
2007-08-14	BranMuffin	NF-PM1	B1=635000
2006-12-18	Team Prime Rib	NF	no factor TF: 1-68
2001-03-05	Joss	NF	no factor TF: 1-56