The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  5  1  1  1  5  1  1
 0  5  0  0  0  0  0  5  5 20 10 15 20 15 15 15 10 10  0  0 10 10 15 15 10 10 10  0  0 10 15 20 15  0 15 10 15 20 20 10  5 20  0 20 20 20 15 10 10 15  5  0 15  0  5  0 10  5 20 10  5  5  0  0  5 20 15  5 15  0
 0  0  5  0  0  5  5 15 20 15  0  5 10 10 20  0  5 20  5  0  5 15 15  5 20  0 10 10 10  5 20 20  5 15 15 20 10 20  5  0  5  0  0  0  5  0  0 20 20 10 20 15 10 10 10  5  5  0 15 10  0 20 15  5 10 10  0 20  0  0
 0  0  0  5  0 15 10 15  5  5 20  5  0  5 10  5 10  5 15 10  5  0 20  5 15 10 20 10 15 10 10 20  0 15 10  0 10 15  5  5  0 20 20  0 15 20 10  0 10 20 15  0 10  5 20  0  5 10  0 10 10 20 15  0 20 15 15  0  0  5
 0  0  0  0  5 15  5 20 15  5 15 20 10  0  0  5 15  0 10  5  5 20 10  5  0 20  0 20  5 20  5 10 20 10 15 10 20 15 15 20 20 20 20  5  5  0  5  5 15 20  0 15 10 20 10 10  0  0 15  0 15 15 20  0  0 20 20 10  5 15

generates a code of length 70 over Z25 who´s minimum homogenous weight is 255.

Homogenous weight enumerator: w(x)=1x^0+36x^255+340x^260+448x^265+412x^270+500x^272+364x^275+4000x^277+292x^280+8000x^282+288x^285+256x^290+168x^295+196x^300+120x^305+92x^310+52x^315+40x^320+4x^325+12x^330+4x^340

The gray image is a code over GF(5) with n=350, k=6 and d=255.
This code was found by Heurico 1.16 in 1.17 seconds.