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

generates a code of length 64 over Z8 who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+23x^58+16x^59+64x^60+144x^61+64x^62+272x^63+31x^64+272x^65+8x^66+8x^68+16x^69+16x^70+16x^71+16x^72+16x^73+16x^74+16x^75+8x^76+1x^122

The gray image is a code over GF(2) with n=256, k=10 and d=116.
This code was found by Heurico 1.16 in 0.221 seconds.