The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+141x^54+144x^55+671x^56+616x^57+1468x^58+1268x^59+2309x^60+2224x^61+2948x^62+2844x^63+3315x^64+2956x^65+3240x^66+2372x^67+2255x^68+1212x^69+1182x^70+516x^71+591x^72+156x^73+200x^74+24x^75+67x^76+4x^77+32x^78+6x^80+4x^82+1x^84+1x^86

The gray image is a code over GF(2) with n=256, k=15 and d=108.
This code was found by Heurico 1.16 in 36.8 seconds.