39 391 357 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 =	635000
B2 =	635000

Status	Date	User	Residue	Shift	Software
Verified	2009-06-06	G-Funk	C8F9BC97629449C8	8966267	Windows,Prime95,v25.9,build 4
Verified	2017-02-18	Dubslow	C8F9BC97629449C8	162783	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-12-18	-anonymous-	NF	no factor TF: 74-75
2020-02-21	-anonymous-	NF	no factor TF: 73-74
2019-10-11	-anonymous-	NF	no factor TF: 72-73
2019-06-20	monst	NF	no factor TF: 71-72
2017-02-18	Dubslow	C-LL	C8F9BC97629449C8
2014-12-13	Jerry Hallett	NF	no factor TF: 70-71
2014-12-08	VictordeHollander	NF	no factor TF: 69-70
2013-09-22	Le Comte	NF	no factor TF: 68-69
2009-06-06	G-Funk	C-LL	C8F9BC97629449C8
2008-10-14	-anonymous-	NF-PM1	B1=635000
2006-12-18	WileECoyote	NF	no factor TF: 1-68
2003-09-29	-anonymous-	NF	no factor TF: 1-60
2003-09-14	-anonymous-	NF	no factor TF: 1-59