48 573 319 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 2⁷²

P-1

B1 =	765000
B2 =	765000

Status	Date	User	Residue	Shift	Software
Bad	2011-01-23	raymondf	F0F837194DCFBCD4	16311411	Linux 64-bit,Prime95,v25.7,build 3
Verified	2015-12-06	Architects Cubed	CA900945BA7E2C26	21115972	Linux 64-bit,Prime95,v27.9,build 1
Verified	2016-08-24	AirSquirrels	CA900945BA7E2C26	30810876	CUDALucas v2.05.1

History

Date	User	Type	Result
2024-08-16	tbusby	NF	no factor TF: 69-70
2018-02-08	Mark Rose	NF	no factor TF: 72-73
2016-08-24	AirSquirrels	C-LL	CA900945BA7E2C26
2016-02-23	Mark Rose	NF	no factor TF: 63-64
2015-12-06	Architects Cubed	C-LL	CA900945BA7E2C26
2015-08-09	Mark Rose	NF	no factor TF: 71-72
2015-08-05	Greg	NF	no factor TF: 70-71
2015-07-23	Architects Cubed	NF	no factor TF: 69-70
2011-01-23	raymondf	C-LL	F0F837194DCFBCD4
2010-10-28	raymondf	NF-PM1	B1=765000
2008-05-21	S00030	NF	no factor TF: 67-68
2008-05-21	S00030	NF	no factor TF: 66-67
2008-05-21	S00030	NF	no factor TF: 68-69
2008-05-21	S00030	NF	no factor TF: 65-66
2008-05-21	S00030	NF	no factor TF: 64-65
2007-12-03	1997rj7	NF	no factor TF: 1-63
2003-06-06	Thomas Mullen	NF	no factor TF: 1-59