The generator matrix

 1  0  0  1  1  1  1  1  1  1  1  1  1 15  1  1  1  1  1  1  1  1  1  1  1 10  0  1  0  1  1  1  1  1  1  5  1 20  1 20  1  1  1  0  1  1  1  1 20  1  1  1  1  1  1  1  1  1  1  1  5  1 15  1  1 10  1  1
 0  1  0  0  5 20 15 16 21 22 14  7 18  1 14  8  6  6 21 13  7 17  3  8 24  1  1 24  1  2 19 16 15  4 19  1 24  0  7  1  3  0  2  1 23 15 16 10  1 10 20 21  2 15 23 14  1  8 23 10  1 22 10 10  2  1  2 16
 0  0  1  1 22 24 18 15 18 19  8  8 23 14 17 19 14 21 12 17 22 15 21  0 11 23  1  4  7  1  0 15  9 14  5 24 21  1 14  7 20  5 11 23  6 13 23  4 11  1 20  9  3  1 23 17 15  8 10 11 10 10  1 12  7 13 19  3
 0  0  0 15 15 20  5  0  0 10 20 10  5  0 15  5 20 15 10 20  0 20 10 15 10  5  5 20 15  0  5 10 10 15  0 20  0 20  5 10 20  5  5 20 20  0 15 15  0 10 10 15 20  0  0 10  5 20 15 20  5  0 15 20 15 10 10 15

generates a code of length 68 over Z25 who´s minimum homogenous weight is 255.

Homogenous weight enumerator: w(x)=1x^0+460x^255+500x^256+360x^257+2120x^259+2084x^260+2160x^261+1320x^262+4980x^264+3136x^265+3900x^266+2220x^267+5680x^269+4768x^270+4780x^271+2080x^272+6400x^274+4908x^275+4560x^276+2340x^277+5820x^279+3952x^280+3140x^281+1440x^282+2320x^284+1236x^285+960x^286+240x^287+180x^289+24x^290+12x^295+16x^300+8x^305+20x^310

The gray image is a code over GF(5) with n=340, k=7 and d=255.
This code was found by Heurico 1.16 in 10 seconds.