48 222 241 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	2010-06-14	henry florence	F5B8D8788349C514	9039434	Windows 64-bit,Prime95,v25.11,build 2
Verified	2015-10-21	Architects Cubed	39D303D5A471A5CF	19044013	Linux 64-bit,Prime95,v27.9,build 1
Verified	2016-08-30	AirSquirrels	39D303D5A471A5CF	0	clLucas v1.04

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
2016-08-30	AirSquirrels	C-LL	39D303D5A471A5CF
2015-10-21	Architects Cubed	C-LL	39D303D5A471A5CF
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
2010-06-14	henry florence	C-LL	F5B8D8788349C514
2010-05-03	henry florence	NF-PM1	B1=560000, B2=13860000
2008-05-10	sannerud.com	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