48 014 177 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 =	14700000

Status	Date	User	Residue	Shift	Software
Bad	2009-12-03	UCLA Mathematics	C4CF889FFA57F74C	29836074	Windows,Prime95,v25.9,build 4
Verified	2010-11-23	-anonymous-	597497173AC45735	40383109	Windows,Prime95,v24 final,(aka Wc1)
Verified	2016-08-22	AirSquirrels	597497173AC45735	0	clLucas v1.04

History

Date	User	Type	Result
2017-12-08	Mark Rose	NF	no factor TF: 72-73
2016-08-22	AirSquirrels	C-LL	597497173AC45735
2015-08-16	Sid & Andy	NF	no factor TF: 71-72
2015-08-09	Mark Rose	NF	no factor TF: 70-71
2015-08-08	Gordon Spence	NF	no factor TF: 69-70
2010-11-23	-anonymous-	C-LL	597497173AC45735
2009-12-03	UCLA Mathematics	C-LL	C4CF889FFA57F74C
2009-10-22	UCLA Mathematics	NF-PM1	B1=560000, B2=14700000, E=6
2008-04-24	precius1	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