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  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  1  2  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  4  1  1  1  1  2  1  1  1  1  1
 0 12  0  4  0  0  4  4  8  8  4 12  0  8  4  4  8  8  4 12  0  0 12 12  0  8  4  4  0  0  4 12  4 12  0  4 12  8  8 12  8  4  4  0 12  0  4  0  8  4 12 12  8  0  4  4  4  0  0 12 12  0  8  8 12 12 12 12 12 12 12 12  8 12  0  0 12  8 12  8
 0  0 12  4  0 12 12  0  8  4  4  0  0  4 12  0  8  4  4  0  8  4  4  8  8  4 12  0  4  0  8 12  4  0  0  8  4 12 12  0  8  4  8  0  4 12 12 12  8 12 12 12 12 12  8  0  4  8  8  0  8  4  4  0  4 12 12  4 12  0 12  4 12  8 12  8  4  8  4 12
 0  0  0  8  0  0  8  0  0  8  0  8  8  8  0  8  8  0  0  0  8  8  8  8  8  8  8  8  0  0  0  0  8  0  8  8  0  8  0  8  8  8  0  0  0  0  8  8  0  0  0  8  8  0  8  0  0  8  0  8  0  8  0  8  0  8  0  8  8  0  8  8  8  0  8  0  0  0  8  0
 0  0  0  0  8  0  0  0  0  0  0  0  0  0  0  0  0  8  8  8  8  8  8  8  8  8  8  8  8  8  8  8  8  0  8  0  8  8  0  8  0  0  8  0  0  8  8  0  8  0  8  0  0  8  8  0  0  0  0  8  0  0  8  0  0  8  0  8  0  0  8  0  8  8  0  8  8  0  0  8
 0  0  0  0  0  8  8  8  8  8  0  8  8  0  8  0  0  8  8  0  0  0  0  8  8  8  8  0  0  8  8  0  0  8  0  8  0  8  0  0  8  8  0  8  8  8  0  0  0  8  8  0  8  0  8  0  8  0  8  8  0  8  0  0  0  8  8  0  8  0  0  8  0  8  8  0  8  0  0  8

generates a code of length 80 over Z16 who´s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+32x^74+50x^75+55x^76+56x^77+44x^78+542x^79+542x^80+538x^81+25x^82+56x^83+21x^84+12x^85+18x^86+22x^87+17x^88+2x^89+7x^90+2x^91+4x^92+1x^94+1x^150

The gray image is a code over GF(2) with n=640, k=11 and d=296.
This code was found by Heurico 1.16 in 0.69 seconds.