49 126 709 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 2⁷³

P-1

B1 =	575000
B2 =	16100000

Status	Date	User	Residue	Shift	Software
Verified	2011-02-21	Kyle Z Schmidt	91ECAD5260DC87A5	6220047	Windows 64-bit,Prime95,v25.11,build 2
Verified	2013-08-11	Sid & Andy	91ECAD5260DC87A5	44702751	Windows 64-bit,Prime95,v26.2,build 1

History

Date	User	Type	Result
2017-09-21	-anonymous-	NF	no factor TF: 72-73
2013-08-11	Sid & Andy	C-LL	91ECAD5260DC87A5
2011-12-22	megavink	NF	no factor TF: 71-72
2011-12-22	megavink	NF	no factor TF: 70-71
2011-11-29	Kyle Askine	NF	no factor TF: 69-70
2011-02-21	Kyle Z Schmidt	C-LL	91ECAD5260DC87A5
2009-04-22	Roman Maznichenko	NF-PM1	B1=575000, B2=16100000, E=6
2008-09-23	David Hruska	NF	no factor TF: 1-69
2008-06-03	-anonymous-	NF	no factor TF: 1-64
2007-06-15	1997rj7	NF	no factor TF: 1-63
2003-09-29	Team Prime Rib	NF	no factor TF: 1-59