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

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

Homogenous weight enumerator: w(x)=1x^0+57x^64+64x^65+126x^66+258x^67+278x^68+320x^69+422x^70+462x^71+511x^72+624x^73+692x^74+720x^75+675x^76+636x^77+522x^78+452x^79+361x^80+230x^81+203x^82+150x^83+133x^84+98x^85+65x^86+54x^87+26x^88+10x^89+14x^90+16x^91+6x^92+2x^93+3x^94+1x^106

The gray image is a code over GF(2) with n=300, k=13 and d=128.
This code was found by Heurico 1.16 in 5.18 seconds.