The generator matrix

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

generates a code of length 65 over Z16 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+4x^64+94x^65+7x^66+12x^67+3x^68+6x^69+1x^70

The gray image is a code over GF(2) with n=520, k=7 and d=256.
This code was found by Heurico 1.16 in 0.12 seconds.