The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+66x^56+208x^57+337x^58+488x^59+635x^60+690x^61+717x^62+714x^63+767x^64+726x^65+638x^66+622x^67+447x^68+390x^69+316x^70+144x^71+113x^72+84x^73+29x^74+14x^75+14x^76+12x^77+3x^78+2x^79+5x^80+2x^81+8x^82

The gray image is a code over GF(2) with n=256, k=13 and d=112.
This code was found by Heurico 1.16 in 2.24 seconds.