48 214 139 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 2⁷⁴

TF target 2⁷²

P-1

B1 =	565000
B2 =	14972500

Status	Date	User	Residue	Shift	Software
Bad	2010-10-22	Dallas	E257535605B5655B	31603013	Windows 64-bit,Prime95,v25.9,build 4
Verified	2011-04-21	linded	6FAFC0EF3496A704	27385103	Windows Service,Prime95,v25.9,build 4
Verified	2016-12-02	Mark Rose	6FAFC0EF3496A704	43590976	Linux 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2019-06-25	Sid & Andy	NF	no factor TF: 73-74
2018-02-16	monst	NF	no factor TF: 72-73
2016-12-02	Mark Rose	C-LL	6FAFC0EF3496A704
2015-08-23	ktony	NF	no factor TF: 71-72
2015-08-23	ktony	NF	no factor TF: 70-71
2015-08-10	Gordon Spence	NF	no factor TF: 69-70
2011-04-21	linded	C-LL	6FAFC0EF3496A704
2010-10-22	Dallas	C-LL	E257535605B5655B
2009-11-09	cmarble	NF-PM1	B1=565000, B2=14972500
2008-05-21	Slug_Racing	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