48 223 573 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 =	560000
B2 =	13860000

Status	Date	User	Residue	Shift	Software
Bad	2010-06-12	henry florence	FB244290833345A7	36641249	Windows 64-bit,Prime95,v25.11,build 2
Verified	2015-10-21	Architects Cubed	206D5661B9A7EB05	37776644	Linux 64-bit,Prime95,v27.9,build 1
Verified	2016-08-21	AirSquirrels	206D5661B9A7EB05	31251211	CUDALucas v2.05.1

History

Date	User	Type	Result
2024-08-16	tbusby	NF	no factor TF: 69-70
2018-02-17	monst	NF	no factor TF: 72-73
2016-08-21	AirSquirrels	C-LL	206D5661B9A7EB05
2015-10-21	Architects Cubed	C-LL	206D5661B9A7EB05
2015-08-10	Sid & Andy	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
2010-06-12	henry florence	C-LL	FB244290833345A7
2010-05-02	henry florence	NF-PM1	B1=560000, B2=13860000
2008-06-02	alan145	NF	no factor TF: 1-69
2008-04-07	Wojciech Florek	NF	no factor TF: 1-64
2008-03-03	1997rj7	NF	no factor TF: 1-63
2003-11-28	apocalypse	NF	no factor TF: 1-60
2003-06-06	Thomas Mullen	NF	no factor TF: 1-59