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 1 1 1 1 1 1 X X X X X X X X 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 X X X X X X 0 X X X 0 0 0
0 X 0 X 0 X 2X 2X 2X 0 0 X X 0 X 2X 2X 2X 0 0 X X 0 X 2X 2X 2X 0 0 X X 0 X 2X 2X 2X 0 0 X X 0 X 2X 2X 2X 0 X X X 0 2X 2X 2X X X X 0 0 0 X X 0 X 2X 2X 2X 0 0 X X 0 X 2X X X 2X 2X 0 X X 0 2X 0 X X 0
0 0 X 2X 2X X 0 X 2X 0 X 2X X 2X 0 0 X 2X 0 X 2X X 2X 0 0 X 2X 0 X 2X X 2X 0 0 X 2X 0 X 2X X 2X 0 0 X 2X X 2X X 0 2X 0 X 2X 0 X 2X X 0 X 2X X 2X 0 0 X 2X 0 X 2X X 2X 0 0 2X X 0 X 2X 0 0 0 2X X X 2X X
generates a code of length 86 over Z3[X]/(X^2) who´s minimum homogenous weight is 173.
Homogenous weight enumerator: w(x)=1x^0+54x^173+10x^174+12x^177+2x^180+2x^183
The gray image is a linear code over GF(3) with n=258, k=4 and d=173.
This code was found by Heurico 1.16 in 0.096 seconds.