The generator matrix

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

generates a code of length 55 over GR(16,4) who´s minimum homogenous weight is 161.

Homogenous weight enumerator: w(x)=1x^0+132x^161+252x^162+27x^164+180x^165+288x^166+27x^168+24x^169+6x^172+36x^173+12x^177+36x^178+3x^188

The gray image is a code over GF(4) with n=220, k=5 and d=161.
This code was found by Heurico 1.16 in 1.17 seconds.