The generator matrix

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

generates a code of length 79 over GR(16,4) who´s minimum homogenous weight is 229.

Homogenous weight enumerator: w(x)=1x^0+204x^229+600x^230+111x^232+528x^233+708x^234+72x^236+396x^237+324x^238+15x^240+144x^241+300x^242+108x^245+180x^246+30x^248+72x^249+120x^250+24x^252+60x^253+48x^254+24x^257+24x^258+3x^280

The gray image is a code over GF(4) with n=316, k=6 and d=229.
This code was found by Heurico 1.16 in 0.14 seconds.