The generator matrix

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

generates a code of length 75 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+45x^64+180x^65+424x^66+652x^67+929x^68+1354x^69+1506x^70+1970x^71+2359x^72+2478x^73+3030x^74+3016x^75+2850x^76+2658x^77+2376x^78+2166x^79+1581x^80+1114x^81+734x^82+498x^83+352x^84+180x^85+138x^86+72x^87+38x^88+36x^89+16x^90+10x^91+5x^92

The gray image is a code over GF(2) with n=300, k=15 and d=128.
This code was found by Heurico 1.16 in 44.7 seconds.