The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  1  2  1  2  1  2  1  1  1  2  1  1
 0  2  0  0  0  0  0  0  0  0  0  2  2  2 2a 2a+2  2 2a 2a+2  2 2a+2  2 2a 2a+2 2a  2  2  2 2a+2  0 2a+2  2  2  2  2 2a  2  2  2  2
 0  0  2  0  0  0  0  2 2a 2a  2 2a+2 2a 2a+2 2a 2a+2 2a  0  2  0 2a+2 2a 2a  0  0 2a  0  2 2a  2  2 2a  2  2 2a+2  0 2a+2 2a 2a+2 2a
 0  0  0  2  0  0  2 2a+2  0 2a 2a 2a 2a+2  0  2 2a+2 2a 2a+2 2a+2  2  2 2a+2 2a+2  0 2a+2  2 2a+2 2a+2 2a+2  0 2a 2a 2a+2  0  2  2  0 2a  2  0
 0  0  0  0  2  0 2a+2  2 2a+2 2a  0  2  2 2a  0  0  2  2  2  2 2a 2a 2a+2 2a+2  0  0 2a+2 2a+2 2a+2  2  2 2a+2 2a+2  2  0  2  0  0  2 2a
 0  0  0  0  0  2  2  2  2  0 2a+2  2  0  2  2 2a+2 2a+2  2 2a+2 2a+2 2a+2 2a  2  0 2a 2a+2  0  2  2  2 2a 2a 2a+2 2a  0  0  2  2 2a+2  0

generates a code of length 40 over GR(16,4) who´s minimum homogenous weight is 100.

Homogenous weight enumerator: w(x)=1x^0+114x^100+330x^104+12x^105+453x^108+180x^109+435x^112+1080x^113+486x^116+3240x^117+462x^120+4860x^121+516x^124+2916x^125+483x^128+372x^132+240x^136+159x^140+33x^144+12x^148

The gray image is a code over GF(4) with n=160, k=7 and d=100.
This code was found by Heurico 1.16 in 1.6 seconds.