48 021 059 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 =	750000
B2 =	750000

Status	Date	User	Residue	Shift	Software
Bad	2009-02-20	curtisc	39403BEB1DEC607D	31788007	Windows Service,Prime95,v25.8,build 1
Verified	2010-01-27	David J. Stucki	255A2B6A3D226428	15152570	Windows,Prime95,v25.7,build 3
Verified	2016-08-29	AirSquirrels	255A2B6A3D226428	0	clLucas v1.04

History

Date	User	Type	Result
2017-12-14	Sid & Andy	NF	no factor TF: 72-73
2016-08-29	AirSquirrels	C-LL	255A2B6A3D226428
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	Sid & Andy	NF	no factor TF: 69-70
2010-01-27	David J. Stucki	C-LL	255A2B6A3D226428
2009-02-20	curtisc	C-LL	39403BEB1DEC607D
2008-12-02	curtisc	NF-PM1	B1=750000
2008-04-24	JC_Herles	NF	no factor TF: 1-69
2003-10-08	Thomas Mullen	NF	no factor TF: 1-60
2003-06-09	Thomas Mullen	NF	no factor TF: 1-59