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

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

Homogenous weight enumerator: w(x)=1x^0+45x^54+118x^55+181x^56+250x^57+311x^58+356x^59+436x^60+610x^61+668x^62+750x^63+850x^64+794x^65+708x^66+530x^67+416x^68+328x^69+215x^70+172x^71+133x^72+106x^73+85x^74+50x^75+28x^76+22x^77+16x^78+8x^79+2x^80+2x^81+1x^96

The gray image is a code over GF(2) with n=256, k=13 and d=108.
This code was found by Heurico 1.16 in 4.21 seconds.