40 093 541 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 =	485000
B2 =	13701250

Status	Date	User	Residue	Shift	Software
Verified	2008-09-16	Alexandr Fomin	A909E1B5B940F167	7173929	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2017-05-28	Dubslow	A909E1B5B940F167	39073433	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-02-28	-anonymous-	NF	no factor TF: 73-74
2019-10-11	-anonymous-	NF	no factor TF: 72-73
2017-05-28	Dubslow	C-LL	A909E1B5B940F167
2015-01-09	monst	NF	no factor TF: 71-72
2014-12-21	megavink	NF	no factor TF: 70-71
2014-12-21	megavink	NF	no factor TF: 69-70
2013-10-27	VictordeHollander	NF	no factor TF: 68-69
2008-08-26	-anonymous-	C-LL	A909E1B5B940F167
2007-09-13	-anonymous-	NF-PM1	B1=485000, B2=13701250
2006-12-18	Michael Hanscho	NF	no factor TF: 1-68
2002-08-31	-anonymous-	NF	no factor TF: 1-57