The generator matrix

 1  0  1  1  1  0  1  1  2  1  1  6  1  4  1  2  1  1  1  1  1  0  1  6  1  1  0  6  1  1  1  4  1  2  1  1  4  1  1  1  6  1  1  0  1  1  1  1  1  1  0  1  4  2  2  1  2  1  2  1  1  2  1  0  6  1  2  2  1  1  2  1  1  6  0  1  1
 0  1  1  0  3  1  2  3  1  6  5  1  3  1  4  1  0  5  6  7  6  1  7  1  2  1  1  1  5  2  4  1  0  1  1  2  1  3  7  6  1  4  3  1  7  1  1  6  4  7  1  0  1  1  1  1  2  6  4  7  5  1  5  1  1  6  2  1  6  2  1  1  7  1  1  7  7
 0  0  2  6  0  6  2  6  2  0  4  4  4  2  2  6  0  0  2  6  0  4  6  0  0  6  0  4  4  6  2  6  0  2  6  6  2  4  2  6  0  2  0  4  0  6  4  0  2  6  2  4  2  2  4  0  2  2  6  2  6  6  4  4  6  2  2  0  6  6  2  4  2  2  6  2  2
 0  0  0  4  0  0  0  0  0  0  0  4  4  0  0  0  0  4  0  4  4  4  4  0  4  4  0  4  4  0  4  0  0  0  4  4  4  0  4  0  4  4  0  4  0  0  4  4  4  0  4  4  0  0  0  0  0  4  0  4  4  4  4  0  4  0  4  4  0  0  4  0  0  4  4  4  0
 0  0  0  0  4  0  0  0  0  0  4  0  4  0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  4  0  0  4  4  4  4  4  4  4  0  4  4  4  4  4  4  4  0  0  0  4  4  0  4  0  4  0  4  4  0  4  0  4  4  0  0  0  0  4  0  4  0  0  4  0  0  0  4
 0  0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  0  0  0  0  4  4  0  0  4  0  4  4  0  0  4  0  0  4  4  0  0  4  0  4  4  0  0  4  4  4  0  4  4  0  4  4  0  4  4  4  0  0  4  4  0  0  4  4  0  0  0  4  4  4  4
 0  0  0  0  0  0  4  0  0  0  0  4  4  0  4  0  0  4  4  4  4  4  4  0  4  4  0  4  4  4  0  4  0  0  4  0  4  4  0  4  4  0  4  0  4  4  0  0  4  4  0  0  0  4  4  0  0  0  4  0  0  4  0  4  4  0  0  4  0  0  0  0  4  4  0  4  0
 0  0  0  0  0  0  0  4  0  0  0  0  0  0  4  4  4  4  4  0  0  0  0  4  4  0  4  0  4  0  4  4  0  4  4  4  0  0  0  4  4  4  0  4  0  0  4  4  4  0  0  0  4  4  0  4  0  4  0  4  4  4  0  0  0  4  4  0  0  4  4  0  0  4  0  4  0
 0  0  0  0  0  0  0  0  4  0  0  0  0  4  0  4  4  4  4  4  4  4  0  0  0  4  0  0  4  4  0  4  0  4  4  0  0  4  4  4  0  4  0  4  4  4  0  4  0  0  0  0  4  0  4  4  4  4  4  0  4  4  4  4  0  0  4  4  0  0  4  0  0  4  0  0  0
 0  0  0  0  0  0  0  0  0  4  4  0  4  4  0  4  0  0  0  0  0  4  4  4  4  4  0  0  0  0  4  4  0  4  4  4  0  4  4  0  0  0  0  0  0  0  0  0  4  4  4  0  4  4  4  4  0  4  0  4  0  0  4  4  4  4  0  0  4  0  4  0  4  0  4  0  0

generates a code of length 77 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+86x^64+4x^65+283x^66+76x^67+599x^68+412x^69+921x^70+996x^71+1549x^72+2000x^73+2078x^74+3000x^75+2616x^76+3384x^77+2822x^78+3080x^79+2174x^80+1956x^81+1503x^82+956x^83+837x^84+428x^85+445x^86+84x^87+255x^88+8x^89+112x^90+54x^92+20x^94+13x^96+8x^98+6x^100+2x^104

The gray image is a code over GF(2) with n=308, k=15 and d=128.
This code was found by Heurico 1.16 in 56.7 seconds.