49 520 011 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 =	570000
B2 =	13395000

Status	Date	User	Residue	Shift	Software
Bad	2011-07-11	OverClock	155FB9FC03BC3640	4889691	Windows,Prime95,v26.5,build 2
Verified	2016-04-04	proxy2222	E6B0DB7A26502A98	39133679	Windows 64-bit,Prime95,v28.7,build 1
Verified	2016-09-10	endless_mike	E6B0DB7A26502A98	33815743	Linux 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2019-07-02	-anonymous-	NF	no factor TF: 73-74
2016-09-10	endless_mike	C-LL	E6B0DB7A26502A98
2016-04-04	proxy2222	C-LL	E6B0DB7A26502A98
2016-03-31	proxy2222	NF	no factor TF: 72-73
2015-08-24	AirSquirrels	NF	no factor TF: 71-72
2015-08-24	AirSquirrels	NF	no factor TF: 70-71
2015-07-21	Sid & Andy	NF	no factor TF: 69-70
2011-07-11	OverClock	C-LL	155FB9FC03BC3640
2010-04-13	linded	NF-PM1	B1=570000, B2=13395000
2008-08-07	ComputerraRU	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