40 609 867 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 =	445000
B2 =	5673750

Status	Date	User	Residue	Shift	Software
Bad	2008-11-18	Kyle Z Schmidt	114284C2FB4BF7A1	14235532	Windows,Prime95,v24 final,(aka Wc1)
Verified	2009-04-14	curtisc	CF1AF94377702623	13854799	Windows Service,Prime95,v25.8,build 1
Verified	2016-06-06	AirSquirrels	CF1AF94377702623	0	clLucas v1.04

History

Date	User	Type	Result
2022-04-16	Sid & Andy	NF	no factor TF: 72-73
2016-06-06	AirSquirrels	C-LL	CF1AF94377702623
2015-05-25	ixfd64	NF	no factor TF: 71-72
2014-12-26	NickOfTime	NF	no factor TF: 70-71
2014-12-26	NickOfTime	NF	no factor TF: 69-70
2013-11-08	VictordeHollander	NF	no factor TF: 68-69
2009-04-14	curtisc	C-LL	CF1AF94377702623
2008-11-18	Kyle Z Schmidt	C-LL	114284C2FB4BF7A1
2007-10-17	-anonymous-	NF-PM1	B1=445000, B2=5673750
2007-01-16	monst	NF	no factor TF: 1-68
2006-10-24	-anonymous-	NF	no factor TF: 1-62