The generator matrix

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

generates a code of length 69 over Z8 who´s minimum homogenous weight is 62.

Homogenous weight enumerator: w(x)=1x^0+122x^62+100x^63+373x^64+248x^65+422x^66+252x^67+453x^68+336x^69+406x^70+252x^71+346x^72+248x^73+232x^74+100x^75+106x^76+38x^78+26x^80+18x^82+4x^84+10x^86+1x^88+1x^92+1x^96

The gray image is a code over GF(2) with n=276, k=12 and d=124.
This code was found by Heurico 1.16 in 0.863 seconds.