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  4  4  1  1  1  4  1  1  1  0  1  1  1  2  1  1  0  1  2  4  1  1  2  0  1  4  4  0  1  1  0  2
 0  2  0  0  0  0  0  0  0  2  6  2  2  6  2  6  4  4  2  0  6  4  6  6  0  4  6  6  0  2  2  0  2  2  4  6  6  4  6  4  6  0  2  6  4  2  2  6  0  0  2  2  2  2  4  2  6  2  2  2  2  2  4  0
 0  0  2  0  0  4  6  2  2  2  2  0  2  6  0  4  6  2  4  6  4  0  6  4  0  2  2  2  0  4  6  0  2  6  2  0  2  2  6  6  0  2  4  0  4  0  4  2  2  4  0  6  2  0  4  4  4  0  0  4  2  6  0  4
 0  0  0  2  0  6  6  6  4  0  0  0  2  6  2  2  2  6  2  4  4  0  6  0  4  4  6  0  6  6  4  6  0  4  6  4  0  4  2  0  6  0  6  4  4  2  6  4  4  6  0  6  0  6  2  6  0  0  2  4  2  2  0  0
 0  0  0  0  2  2  4  6  2  0  2  2  2  0  0  6  2  4  6  6  2  6  2  0  0  4  0  4  4  4  2  6  0  4  0  0  0  6  4  4  2  4  0  6  2  4  2  0  4  6  6  6  2  2  2  6  2  6  6  4  4  6  2  2

generates a code of length 64 over Z8 who´s minimum homogenous weight is 57.

Homogenous weight enumerator: w(x)=1x^0+70x^57+96x^58+122x^59+148x^60+160x^61+185x^62+214x^63+214x^64+146x^65+173x^66+138x^67+109x^68+78x^69+45x^70+36x^71+24x^72+40x^73+12x^74+16x^75+13x^76+2x^77+2x^79+3x^80+1x^98

The gray image is a code over GF(2) with n=256, k=11 and d=114.
This code was found by Heurico 1.16 in 0.501 seconds.