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

generates a code of length 75 over Z8 who´s minimum homogenous weight is 68.

Homogenous weight enumerator: w(x)=1x^0+149x^68+16x^69+161x^70+64x^71+231x^72+112x^73+285x^74+128x^75+258x^76+112x^77+174x^78+64x^79+107x^80+16x^81+58x^82+69x^84+25x^86+13x^88+1x^90+3x^92+1x^124

The gray image is a code over GF(2) with n=300, k=11 and d=136.
This code was found by Heurico 1.16 in 0.92 seconds.