40 052 351 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 =	480000
B2 =	12120000

Status	Date	User	Residue	Shift	Software
Verified	2010-06-01	tsc	DE9EC240A8753A82	25742305	Windows,Prime95,v24 final,(aka Wc1)
Verified	2017-02-05	Dubslow	DE9EC240A8753A82	10246846	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-02-14	-anonymous-	NF	no factor TF: 73-74
2019-10-04	-anonymous-	NF	no factor TF: 72-73
2017-02-05	Dubslow	C-LL	DE9EC240A8753A82
2015-01-01	Gordon Spence	NF	no factor TF: 71-72
2014-12-16	Chuck	NF	no factor TF: 70-71
2014-12-14	Andrew B	NF	no factor TF: 69-70
2013-10-27	VictordeHollander	NF	no factor TF: 68-69
2010-11-14	Commaster	NF-PM1	B1=480000, B2=12120000, E=6
2010-06-01	tsc	C-LL	DE9EC240A8753A82
2006-11-28	JC_Herles	NF	no factor TF: 1-68
2001-08-04	-anonymous-	NF	no factor TF: 1-57