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

generates a code of length 41 over GR(16,4) who´s minimum homogenous weight is 104.

Homogenous weight enumerator: w(x)=1x^0+210x^104+339x^108+465x^112+192x^114+468x^116+1728x^118+447x^120+5184x^122+513x^124+5184x^126+444x^128+438x^132+417x^136+213x^140+90x^144+42x^148+6x^152+3x^156

The gray image is a code over GF(4) with n=164, k=7 and d=104.
This code was found by Heurico 1.16 in 1.68 seconds.