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  0  2  2  4  2  2  1  2  1  2  1  0  2  2  2  0  2  0  2  4  1  4  4  1  1  1  2  1  1  2  0  1  0  0  0  1  1
 0  2  0  0  0  2  6  2  0  0  0  0  2  2  4  2  6  4  6  0  6  6  4  2  6  4  0  0  2  6  0  4  2  4  2  4  4  2  2  0  2  0  2  0  4  0  4  6  6  2  4  2  0  2  6  0  0  2  6  2  2  2  2  0  0  0  0  4  0  2  0  4  2  4  2  0  4  2  0
 0  0  2  0  2  2  6  0  0  0  2  6  6  6  4  0  0  0  6  2  0  2  2  4  2  4  6  0  2  2  2  6  4  4  0  0  4  0  4  2  0  0  4  4  2  2  0  6  0  0  4  0  2  0  0  4  6  6  4  6  4  2  6  4  2  4  0  0  6  6  0  6  6  6  4  2  2  2  0
 0  0  0  2  2  0  6  2  0  6  2  4  0  2  0  2  0  2  4  6  4  2  0  6  4  2  0  4  2  4  0  2  6  4  4  2  4  2  2  4  6  6  4  2  4  2  2  2  0  6  4  6  2  4  0  2  0  0  2  6  2  6  2  2  6  2  2  2  0  6  0  2  6  4  4  0  0  0  0
 0  0  0  0  4  0  0  0  0  0  4  0  0  0  0  0  0  0  0  4  0  4  0  4  0  0  4  4  4  4  4  0  0  4  4  4  0  0  4  0  4  0  4  0  0  4  4  0  4  4  0  4  0  4  4  4  0  0  4  0  4  4  4  4  0  4  0  0  0  0  4  0  0  4  4  4  0  0  0
 0  0  0  0  0  4  0  0  0  0  0  0  4  0  0  0  0  0  4  0  0  0  4  4  4  0  0  4  4  4  4  0  0  4  4  4  0  4  0  0  0  4  4  4  4  4  0  0  0  0  0  0  4  4  0  4  4  0  4  0  0  4  0  4  4  0  4  4  4  0  0  4  4  4  0  4  0  0  0
 0  0  0  0  0  0  4  0  0  0  0  0  0  4  0  0  0  0  0  0  4  4  4  4  4  4  4  4  4  0  0  4  0  0  0  0  0  4  0  0  4  0  4  4  4  4  4  0  4  0  4  4  4  4  0  4  0  0  0  4  4  0  4  0  0  4  4  0  0  0  0  4  0  4  0  0  0  4  0
 0  0  0  0  0  0  0  4  0  0  0  0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  4  4  4  4  4  4  4  0  4  4  4  0  4  4  0  4  4  4  4  4  0  4  4  4  0  0  0  0  0  4  4  4  0  0  0  0  4  4  0
 0  0  0  0  0  0  0  0  4  0  0  0  0  0  0  4  4  4  4  4  4  0  4  0  0  4  0  4  4  0  4  0  0  4  4  0  0  4  4  4  4  4  0  4  4  0  4  4  0  0  0  0  0  4  0  4  0  4  4  4  4  0  0  0  4  0  0  0  4  4  0  4  4  0  4  0  0  0  0
 0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  4  4  0  4  4  4  4  4  4  4  0  4  4  4  0  4  0  4  0  0  4  0  4  0  4  0  4  4  0  0  0  4  0  4  4  0  0  4  4  0  4  0  0  4  4  4  4  4  4  4  4  4  0  4  0  0  0  4  0  0  0  0  0  0

generates a code of length 79 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+33x^64+82x^65+141x^66+212x^67+316x^68+456x^69+525x^70+700x^71+810x^72+1140x^73+1359x^74+1814x^75+2165x^76+2408x^77+2815x^78+2728x^79+2818x^80+2442x^81+2242x^82+1904x^83+1463x^84+1160x^85+797x^86+604x^87+437x^88+400x^89+228x^90+182x^91+112x^92+88x^93+69x^94+48x^95+26x^96+16x^97+13x^98+7x^100+2x^102+3x^104+1x^106+1x^108

The gray image is a code over GF(2) with n=316, k=15 and d=128.
This code was found by Heurico 1.16 in 79.9 seconds.