48 572 059 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 =	565000
B2 =	14831250

Status	Date	User	Residue	Shift	Software
Bad	2010-01-31	curtisc	BA9F7F696C5F144D	783346	Windows Service,Prime95,v25.8,build 1
Verified	2010-02-21	MarkoH	EE2E185A19E09601	37632399	Linux 64-bit,Prime95,v25.9,build 4
Verified	2016-08-26	AirSquirrels	EE2E185A19E09601	0	clLucas v1.04

History

Date	User	Type	Result
2018-02-08	Mark Rose	NF	no factor TF: 72-73
2016-08-26	AirSquirrels	C-LL	EE2E185A19E09601
2016-02-23	Mark Rose	NF	no factor TF: 63-64
2015-08-16	Sid & Andy	NF	no factor TF: 71-72
2015-08-09	Mark Rose	NF	no factor TF: 70-71
2015-07-24	Gordon Spence	NF	no factor TF: 69-70
2010-02-21	MarkoH	C-LL	EE2E185A19E09601
2010-02-01	MarkoH	NF-PM1	B1=565000, B2=14831250, E=6
2010-01-31	curtisc	C-LL	BA9F7F696C5F144D
2008-06-02	Mike Curtis	NF	no factor TF: 67-68
2008-06-02	Mike Curtis	NF	no factor TF: 64-65
2008-06-02	Mike Curtis	NF	no factor TF: 66-67
2008-06-02	Mike Curtis	NF	no factor TF: 65-66
2008-06-02	Mike Curtis	NF	no factor TF: 68-69
2007-12-03	1997rj7	NF	no factor TF: 1-63
2003-06-06	Thomas Mullen	NF	no factor TF: 1-59