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

generates a code of length 67 over Z8 who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+87x^58+4x^59+236x^60+20x^61+354x^62+136x^63+423x^64+232x^65+510x^66+244x^67+471x^68+228x^69+399x^70+128x^71+252x^72+32x^73+136x^74+96x^76+71x^78+22x^80+11x^82+2x^88+1x^100

The gray image is a code over GF(2) with n=268, k=12 and d=116.
This code was found by Heurico 1.16 in 1.11 seconds.