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

generates a code of length 64 over Z8 who´s minimum homogenous weight is 56.

Homogenous weight enumerator: w(x)=1x^0+87x^56+8x^57+119x^58+16x^59+172x^60+88x^61+272x^62+160x^63+290x^64+120x^65+232x^66+80x^67+159x^68+40x^69+110x^70+50x^72+29x^74+4x^76+2x^78+3x^80+4x^82+1x^84+1x^104

The gray image is a code over GF(2) with n=256, k=11 and d=112.
This code was found by Heurico 1.16 in 0.388 seconds.