The generator matrix

 1  0  1  1  1  1  1  1  1  0  1  1  1  1  0  1  1  1  1  2  1  1  1  1  2  1  1  2  1  1  1  1  1  1  1  1  2  1  1 2a  1  2  1  1  1
 0  1  1  a a+1  0 2a+3  a a+1  1  0  a 2a+3 a+1  1  2 2a+3 a+2 a+3  1  2  1 a+2 a+3  1  2 2a+1  1 a+2 3a+3 2a+3 2a+1  3 2a+1 2a+1 a+2  1 2a+2 3a+2  1  1  2  2 a+3 a+3
 0  0 2a+2  0  2  0  2 2a 2a 2a 2a  2 2a+2 2a+2  0 2a+2  0 2a+2  0  2  2 2a 2a  2 2a+2 2a  2 2a 2a+2 2a  0 2a+2 2a+2 2a  0 2a  2  0  2  0  0  0  2  2 2a+2
 0  0  0  2 2a 2a  0 2a  2  2  0  2 2a  2  2  0  0  2  2  2  0  0  2  2  2 2a 2a  0 2a 2a 2a 2a+2  2  2  0  0 2a 2a+2 2a+2 2a+2  2 2a+2 2a 2a  0

generates a code of length 45 over GR(16,4) who´s minimum homogenous weight is 128.

Homogenous weight enumerator: w(x)=1x^0+924x^128+1068x^132+816x^136+756x^140+462x^144+48x^148+12x^152+9x^160

The gray image is a code over GF(4) with n=180, k=6 and d=128.
This code was found by Heurico 1.16 in 55.7 seconds.