39 916 537 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 =	455000
B2 =	11943750

Status	Date	User	Residue	Shift	Software
Verified	2009-04-04	curtisc	35B29A16D12AF445	20637090	Windows Service,Prime95,v25.8,build 1
Verified	2017-04-28	Dubslow	35B29A16D12AF445	23002122	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-01-31	-anonymous-	NF	no factor TF: 73-74
2019-10-18	-anonymous-	NF	no factor TF: 72-73
2019-04-01	monst	NF	no factor TF: 71-72
2017-04-28	Dubslow	C-LL	35B29A16D12AF445
2014-12-19	1997rj7	NF	no factor TF: 70-71
2014-12-16	VictordeHollander	NF	no factor TF: 69-70
2009-04-04	curtisc	C-LL	35B29A16D12AF445
2008-06-13	-anonymous-	NF-PM1	B1=455000, B2=11943750
2006-11-28	-anonymous-	NF	no factor TF: 1-69