The generator matrix

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

generates a code of length 69 over Z8 who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+36x^58+148x^59+386x^60+554x^61+1130x^62+1026x^63+1628x^64+1820x^65+2759x^66+2376x^67+3238x^68+2470x^69+3432x^70+2522x^71+2756x^72+1758x^73+1667x^74+996x^75+847x^76+440x^77+335x^78+138x^79+162x^80+54x^81+46x^82+24x^83+5x^84+8x^85+3x^86+2x^87+1x^88

The gray image is a code over GF(2) with n=276, k=15 and d=116.
This code was found by Heurico 1.16 in 40 seconds.