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

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

Homogenous weight enumerator: w(x)=1x^0+64x^57+123x^58+114x^59+73x^60+158x^61+213x^62+196x^63+244x^64+192x^65+209x^66+146x^67+47x^68+72x^69+65x^70+42x^71+15x^72+24x^73+23x^74+12x^75+4x^76+2x^77+6x^78+2x^79+1x^106

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 1.68 seconds.