The generator matrix

 1  0  1  1  1  6  1  1 14  1 12  1  1  1  0  1  2  1  1 14  1  1  1 12  1  8  1 14  1  1  1  1  1  6  0  1  1  8  1  2  1  1 10  1 10  1  1  1  1 14  1 10  2  8  2  1  1  1  2  1 10  8  2  1  1  4  1  1 14  2  0  1  0  1
 0  1 11  6  1  1  0 11  1 14  1  5 15  0  1 14  1  5 12  1 11 14 13  1  7  1  8  1  6  8 13  9  3  1  1 14  3  1  4  1  3 14  1 14  1  4 10 13 14  1  1  1  1  1  8  1 10  4 10 13  1  1  0  2  3  0  2 12  1 14  0 15  2  3
 0  0 12  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  8  8  8  8  8  8  8  8  0  8  4  4 12 12  4 12  4  4  4 12  4  4 12 12  4  0  8 12  4  4 12  8  4  4  4  4  8 12  0 12  4  4  8 12  0 12  8  8  4  4  4  0  8  4
 0  0  0 12  0  0  0  0  8  4  8 12 12 12 12  0 12  8  4 12 12  8 12  4  0  0  4  4  4  8  8 12  0  4  8  4  0  4  8  4  4 12  8  8  4 12  8  0 12  4  4  8  0  8  4  8  8  0  8 12 12  8  0  0  0  0  0 12  4  8  0 12  0  4
 0  0  0  0  4  0  4  0  4  4 12  4  8  0  0  8  4  8 12  8  4 12  8  4  4  8  0  0 12  8  4 12  4  4 12 12  0  4  0  8  8  8  8  4  8 12  4  0 12 12  8  4 12 12  4  8 12  4  4  4  4  0 12  8  8 12  8  0  0  4  4  0  4  4
 0  0  0  0  0 12  4 12  8  4  4  0  4 12  4 12  4  0  8  8 12  8  8  0  4  4  8  0  8 12  4  4  0 12  0  8  4  8  8 12  4 12 12  0  8  4 12  8 12  0  4  4  4  8  4  8  0  4  4  0 12  8  0 12  8  4  8  0  4 12  4  4 12  4

generates a code of length 74 over Z16 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+156x^64+68x^65+664x^66+552x^67+1615x^68+2088x^69+3534x^70+4756x^71+7180x^72+7744x^73+8872x^74+8000x^75+6931x^76+4972x^77+3528x^78+2004x^79+1441x^80+420x^81+488x^82+112x^83+229x^84+4x^85+114x^86+38x^88+16x^90+9x^92

The gray image is a code over GF(2) with n=592, k=16 and d=256.
This code was found by Heurico 1.16 in 64.5 seconds.