The generator matrix

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

generates a code of length 64 over Z25 who´s minimum homogenous weight is 254.

Homogenous weight enumerator: w(x)=1x^0+180x^254+12x^255+300x^256+120x^259+8x^270+4x^295

The gray image is a code over GF(5) with n=320, k=4 and d=254.
This code was found by Heurico 1.16 in 0.093 seconds.