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  0  2  8  0  2  1  2  1  0  2  1  1  2  1  1  1 12  0  1  1  2  1  2  1  0  1  1  4  2  1  1  1  2  0  1  8  1  2  4  1  1  0  8  2  1  1  1
 0  2  0  6  0  6  8 10  8  6  8  2  0 14  2  0  8  6  0 10  4  4  6 12  2  6 12  2  6  2  2 14 14  6 12  2 14 10  8  2  0 12 10  2  2  4  6 10 14 10  4  2  0  2  2  2  8 12 10 10  2 10  2 10  6  0 14  2  2  2 14 12  8 14
 0  0 12  0  0  0 12  0  0  0  8  0 12  0  0 12  0  4  8 12 12  4 12  4  4  4  8  0  8  8  8  0  4 12 12 12  4 12  0  4  8  4 12  4  4  0 12  0  0 12 12  4 12 12  4  0  8  0  8 12 12  8 12 12  8 12 12  0  8  8 12  0  8  4
 0  0  0 12  0  0  0  4  0  0  0  8  0  4  4  8 12  8 12 12  4  4  8 12  0  4 12 12  8  4  8  8  4 12  8 12 12  8  8  8  4  8  4 12  8  8 12  4  8  0 12  8  4  8  4  8  8  0  8  0 12 12  4  0  4 12  4 12 12  4  8  8  0  4
 0  0  0  0 12  0  4  0  8  4  4  4  4 12 12  0  8  8 12 12  8  4 12  4  0  0  0  0  4  4  8  4  0  8  4  4 12  4  4 12  4  0  4  4  8  0  8 12 12 12 12  8  8  0  4  0 12  8 12  8 12 12 12 12  8  8  0  8 12  8  0  8  8 12
 0  0  0  0  0 12  0 12 12  4  4  0  4  0  4 12  8  4  0  4  4  4  8  0  8  0  4  4  4 12  8  0  4  0  4 12  8  4 12  4  4  8  0 12  4 12  8  0  0  0  8  8  8  8  0 12  8  8  0 12  0  8  8  4 12  4  8  8  4  8  0  0  0  0

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

Homogenous weight enumerator: w(x)=1x^0+164x^64+28x^65+470x^66+284x^67+1066x^68+848x^69+2104x^70+2360x^71+3397x^72+3672x^73+4170x^74+3628x^75+3456x^76+2308x^77+2000x^78+928x^79+911x^80+244x^81+370x^82+32x^83+165x^84+4x^85+88x^86+53x^88+14x^90+2x^96+1x^100

The gray image is a code over GF(2) with n=592, k=15 and d=256.
This code was found by Heurico 1.16 in 26.9 seconds.