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

generates a code of length 55 over GR(16,4) who´s minimum homogenous weight is 163.

Homogenous weight enumerator: w(x)=1x^0+132x^163+27x^164+48x^167+21x^168+9x^172+6x^176+12x^179

The gray image is a code over GF(4) with n=220, k=4 and d=163.
This code was found by Heurico 1.16 in 0.078 seconds.