39 656 509 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 2⁷⁵

TF target 2⁷²

P-1

B1 =	465000
B2 =	11160000

Status	Date	User	Residue	Shift	Software
Bad	2008-04-04	Andrey Kurgannikov	04266A5666C35660	21260108	Windows,Prime95,v24 final,(aka Wc1)
Verified	2017-03-29	Dubslow	A6BBC67269330D3B	18682548	Linux 64-bit,Prime95,v28.7,build 1
Verified	2017-04-01	MadPoo 🙂	A6BBC67269330D3B	23432975	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2024-05-30	LaurV	NF	no factor TF: 68-69
2021-05-15	-anonymous-	NF	no factor TF: 74-75
2020-02-28	-anonymous-	NF	no factor TF: 73-74
2019-10-11	-anonymous-	NF	no factor TF: 72-73
2019-07-08	monst	NF	no factor TF: 71-72
2017-04-01	MadPoo 🙂	C-LL	A6BBC67269330D3B
2017-03-29	Dubslow	C-LL	A6BBC67269330D3B
2014-12-14	megavink	NF	no factor TF: 70-71
2014-12-14	megavink	NF	no factor TF: 69-70
2013-10-01	Carsten Kossendey	NF	no factor TF: 68-69
2008-04-03	Andrey Kurgannikov	C-LL	04266A5666C35660
2008-03-03	Andrey Kurgannikov	NF-PM1	B1=465000, B2=11160000
2006-11-28	Ed Straker	NF	no factor TF: 1-68
2002-02-17	Joss	NF	no factor TF: 1-57
2001-01-28	Joss	NF	no factor TF: 1-56