39 910 139 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 2⁷⁴

TF target 2⁷²

P-1

B1 =	455000
B2 =	7735000

Status	Date	User	Residue	Shift	Software
Verified	2008-02-03	Neil Hallis	1F06B8D078EA01F9	12884350	Windows 64-bit,Prime95,v24 final,(aka Wc4)
Bad	2017-01-17	ktony	A5379EEEBCB47497	32048774	Windows 64-bit,Prime95,v28.10,build 1
Verified	2017-01-19	ATH	1F06B8D078EA01F9	1383	CUDALucas v2.05.1

History

Date	User	Type	Result
2024-05-21	James Heinrich	NF	no factor TF: 68-69
2020-01-31	-anonymous-	NF	no factor TF: 73-74
2019-10-12	-anonymous-	NF	no factor TF: 72-73
2019-03-25	monst	NF	no factor TF: 71-72
2017-01-19	ATH	C-LL	1F06B8D078EA01F9
2017-01-17	ktony	C-LL	A5379EEEBCB47497
2014-12-17	garo	NF	no factor TF: 70-71
2014-12-17	garo	NF	no factor TF: 69-70
2012-10-07	Carsten Kossendey	NF	no factor TF: 68-69
2008-02-03	NeilH	C-LL	1F06B8D078EA01F9
2007-09-13	NeilH	NF-PM1	B1=455000, B2=7735000
2006-11-28	Team Prime Rib	NF	no factor TF: 1-68