The generator matrix

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

generates a code of length 55 over GR(16,4) who´s minimum homogenous weight is 164.

Homogenous weight enumerator: w(x)=1x^0+36x^164+192x^165+12x^168+9x^172+3x^176+3x^188

The gray image is a code over GF(4) with n=220, k=4 and d=164.
This code was found by Heurico 1.16 in 0.032 seconds.