The generator matrix

 1  0  1  1  1  4  1  1  4  1  1  0  1  1  6  1  1  2  1  1  2  1  1  6  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  4  4  0  0  6  6  2  2  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  1  1  4  3  1  0  7  1  4  5  1  2  7  1  6  5  1  2  3  1  6  1  1  4  0  4  0  3  1  7  5  6  2  6  2  7  3  5  1  1  1  1  1  1  1  1  1  0  0  4  4  2  2  6  6  4  4  0  0  6  6  2  2
 0  0  2  6  4  6  4  0  2  2  6  4  2  2  0  0  4  6  6  6  2  4  0  4  4  6  0  2  0  6  4  2  6  4  2  0  6  2  0  4  4  0  6  2  6  2  4  0  0  4  2  6  2  6  0  4  4  0  6  2  6  2  4  0

generates a code of length 64 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+253x^64+2x^96

The gray image is a code over GF(2) with n=256, k=8 and d=128.
This code was found by Heurico 1.16 in 0.103 seconds.