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

generates a code of length 77 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+166x^70+8x^71+184x^72+68x^73+184x^74+128x^75+281x^76+124x^77+252x^78+104x^79+199x^80+60x^81+84x^82+16x^83+64x^84+4x^85+70x^86+32x^88+12x^90+6x^92+1x^124

The gray image is a code over GF(2) with n=308, k=11 and d=140.
This code was found by Heurico 1.16 in 0.656 seconds.