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

generates a code of length 65 over Z16 who´s minimum homogenous weight is 59.

Homogenous weight enumerator: w(x)=1x^0+98x^59+131x^60+260x^61+254x^62+498x^63+533x^64+642x^65+494x^66+464x^67+266x^68+232x^69+76x^70+78x^71+22x^72+18x^73+5x^74+10x^75+7x^76+2x^78+4x^79+1x^106

The gray image is a code over GF(2) with n=520, k=12 and d=236.
This code was found by Heurico 1.16 in 0.68 seconds.