The generator matrix

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

generates a code of length 91 over GR(16,4) who´s minimum homogenous weight is 260.

Homogenous weight enumerator: w(x)=1x^0+267x^260+444x^261+108x^262+600x^263+1245x^264+1152x^265+120x^266+816x^267+1098x^268+876x^269+204x^270+708x^271+1119x^272+792x^273+84x^274+540x^275+990x^276+804x^277+72x^278+588x^279+645x^280+600x^281+84x^282+300x^283+525x^284+432x^285+48x^286+144x^287+372x^288+180x^289+48x^290+120x^291+117x^292+84x^293+24x^295+18x^296+12x^297+3x^300

The gray image is a code over GF(4) with n=364, k=7 and d=260.
This code was found by Heurico 1.16 in 1.58 seconds.