The generator matrix

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

generates a code of length 64 over Z8 who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+101x^58+100x^59+233x^60+148x^61+244x^62+136x^63+201x^64+136x^65+194x^66+148x^67+179x^68+100x^69+88x^70+18x^72+5x^74+1x^76+4x^78+4x^80+4x^82+3x^84

The gray image is a code over GF(2) with n=256, k=11 and d=116.
This code was found by Heurico 1.16 in 0.286 seconds.