48 517 037 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	2010-03-23	-anonymous-	D1BEC51AC8CD018E	14196179	Windows,Prime95,v25 beta,(aka Wd1)
Verified	2010-12-22	DaveA	303769FFF21EB28D	15793402	Linux 32-bit,Prime95,v24 final,(aka Wc2)
Verified	2016-08-25	AirSquirrels	303769FFF21EB28D	0	clLucas v1.04

History

Date	User	Type	Result
2018-02-08	Mark Rose	NF	no factor TF: 72-73
2016-08-25	AirSquirrels	C-LL	303769FFF21EB28D
2015-08-16	Sid & Andy	NF	no factor TF: 71-72
2015-08-09	Mark Rose	NF	no factor TF: 70-71
2015-07-28	Gordon Spence	NF	no factor TF: 69-70
2010-12-22	DaveA	C-LL	303769FFF21EB28D
2010-03-23	-anonymous-	C-LL	D1BEC51AC8CD018E
2009-11-25	-anonymous-	NF-PM1	B1=765000
2008-05-21	smintheus	NF	no factor TF: 1-69
2007-12-03	1997rj7	NF	no factor TF: 1-63
2003-06-06	Thomas Mullen	NF	no factor TF: 1-59