49 510 871 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 =	1000000
B2 =	20000000

Status	Date	User	Residue	Shift	Software
Bad	2011-02-08	curtisc	EC25F66E5C14319F	13081353	Windows Service,Prime95,v25.11,build 2
Verified	2012-11-22	ANONYMOUS	A5EEF261A2E6681F	10500851	Windows 64-bit,Prime95,v27.7,build 2
Verified	2016-05-08	kkmrkkblmbrbk	A5EEF261A2E6681F	11929306	Windows 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2019-07-02	-anonymous-	NF	no factor TF: 73-74
2019-06-15	Sid & Andy	NF-PM1	B1=1000000, B2=20000000, E=12
2017-12-05	monst	NF	no factor TF: 72-73
2016-05-08	kkmrkkblmbrbk	C-LL	A5EEF261A2E6681F
2012-11-22	ANONYMOUS	C-LL	A5EEF261A2E6681F
2012-06-28	bcp19	NF	no factor TF: 69-72
2011-02-08	curtisc	C-LL	EC25F66E5C14319F
2010-10-12	corza	NF-PM1	B1=785000
2008-08-07	David Barley	NF	no factor TF: 1-69
2007-06-15	1997rj7	NF	no factor TF: 1-63
2003-12-13	Team Prime Rib	NF	no factor TF: 1-59
2000-10-15	Joss	NF	no factor TF: 1-58