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

generates a code of length 85 over GR(16,4) who´s minimum homogenous weight is 247.

Homogenous weight enumerator: w(x)=1x^0+240x^247+318x^248+216x^249+240x^250+672x^251+318x^252+108x^253+180x^254+384x^255+246x^256+132x^257+60x^258+96x^259+177x^260+48x^261+36x^262+120x^263+39x^264+36x^265+24x^266+96x^267+51x^268+12x^269+12x^270+72x^271+24x^272+24x^273+12x^274+48x^275+42x^276+12x^278

The gray image is a code over GF(4) with n=340, k=6 and d=247.
This code was found by Heurico 1.16 in 0.187 seconds.