The generator matrix

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

generates a code of length 25 over Z8 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+97x^18+348x^19+868x^20+1616x^21+2451x^22+3624x^23+4676x^24+5192x^25+4895x^26+3712x^27+2535x^28+1536x^29+743x^30+312x^31+110x^32+40x^33+4x^34+4x^35+1x^36+2x^38+1x^40

The gray image is a code over GF(2) with n=100, k=15 and d=36.
This code was found by Heurico 1.16 in 8.28 seconds.