50 139 031 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 2⁷³

P-1

B1 =	810000
B2 =	810000

Status	Date	User	Residue	Shift	Software
Verified	2011-11-07	curtisc	2D3DAADB9C10DE55	43328190	Windows Service,Prime95,v26.5,build 5
Verified	2020-02-19	Dubslow	2D3DAADB9C10DE55	43892343	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2020-02-19	Dubslow	C-LL	2D3DAADB9C10DE55
2018-12-09	Mark Rose	NF	no factor TF: 73-74
2015-12-14	AirSquirrels	NF	no factor TF: 72-73
2015-11-17	Sid & Andy	NF	no factor TF: 71-72
2011-11-07	curtisc	C-LL	2D3DAADB9C10DE55
2011-07-27	kdgehman	NF	no factor TF: 70-71
2011-07-27	kdgehman	NF	no factor TF: 69-70
2010-09-17	Jack The Ripper	NF-PM1	B1=810000
2008-09-23	kutens	NF	no factor TF: 1-69
2004-03-01	-anonymous-	NF	no factor TF: 1-61
2003-11-08	-anonymous-	NF	no factor TF: 1-60
2001-12-08	-anonymous-	NF	no factor TF: 1-58
2001-03-25	-anonymous-	NF	no factor TF: 1-57
2000-04-05	-anonymous-	NF	no factor TF: 1-56
2000-02-09	-anonymous-	NF	no factor TF: 1-54
2000-01-04	-anonymous-	NF	no factor TF: 1-53
1999-10-07	-anonymous-	NF	no factor TF: 1-53