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

generates a code of length 69 over Z25 who´s minimum homogenous weight is 255.

Homogenous weight enumerator: w(x)=1x^0+272x^255+412x^260+472x^265+388x^270+2500x^272+328x^275+10000x^277+280x^280+256x^285+204x^290+136x^295+128x^300+108x^305+72x^310+40x^315+16x^320+8x^325+4x^340

The gray image is a code over GF(5) with n=345, k=6 and d=255.
This code was found by Heurico 1.16 in 6.11 seconds.