The generator matrix

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

generates a code of length 64 over Z8 who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+131x^54+56x^55+406x^56+268x^57+758x^58+476x^59+1262x^60+1056x^61+1636x^62+1240x^63+1954x^64+1176x^65+1731x^66+1056x^67+1104x^68+512x^69+674x^70+240x^71+302x^72+60x^73+166x^74+4x^75+80x^76+22x^78+9x^80+1x^82+2x^84+1x^86

The gray image is a code over GF(2) with n=256, k=14 and d=108.
This code was found by Heurico 1.16 in 11.8 seconds.