The generator matrix

 1  0  0  1  1  1  0  1  1 X^2  1  X  1  0  1 X^2+X  1 X^2+X  1  1 X^2+X  1  1 X^2  X  1  1 X^2+X  1 X^2+X  X  1  1  1 X^2  1 X^2+X  0  1  1  0  1  X  1 X^2+X  0  1  1  1  1 X^2+X  X X^2+X X^2  0 X^2  1  1  0  X  1  1 X^2+X  1  1  1  1  0  X  1  1  1 X^2  X  1  0 X^2  1 X^2+X  0  1
 0  1  0  0  1  1  1 X^2  1  1 X^2+1  1 X^2+X X^2+X X+1  1  X  X X+1 X^2+X X^2  X  0  1  1 X+1 X+1  1 X^2+X  1  X  0  1  X  1 X^2+X+1 X^2 X^2  X  0  1 X+1  1 X^2+X+1  1  X X^2+1  0 X^2+X  X  1  1 X^2 X^2+X X^2  1  0  1  1 X^2 X^2+1 X^2  0  1 X^2+X+1 X+1  1  1  1 X+1 X+1 X^2+1  0  X  X  1  1  1  X  0  0
 0  0  1 X+1 X^2+X+1  0 X+1  X  1 X^2+1  X X^2+X X+1  1  X  0  X  1 X^2+1 X^2+1  1 X^2 X^2+1  X  1 X^2 X^2+X+1 X^2+X+1 X^2+1  0  1 X^2+X X^2+1 X+1 X^2+X X^2+X  1  1  X X^2 X+1 X^2+X+1  1  X  X  1 X+1 X+1  X X^2+X X+1 X^2+X  1  1  1  1  0 X^2+X+1 X+1  1 X^2+X X^2+X  1  0 X^2+1 X+1 X^2+X+1 X^2+X X^2+1  0 X^2+X+1 X^2  1  1 X+1 X^2 X^2  0  1  1  0
 0  0  0 X^2  0  0  0 X^2 X^2 X^2  0  0  0 X^2 X^2 X^2  0 X^2 X^2 X^2  0 X^2  0  0  0  0 X^2  0  0 X^2 X^2 X^2  0 X^2 X^2 X^2  0 X^2  0  0 X^2  0 X^2 X^2 X^2  0  0 X^2 X^2 X^2 X^2  0 X^2  0 X^2  0  0  0 X^2 X^2 X^2  0  0  0  0  0  0  0  0 X^2 X^2  0  0 X^2  0 X^2  0 X^2 X^2  0 X^2
 0  0  0  0 X^2  0 X^2  0 X^2 X^2 X^2 X^2  0  0 X^2 X^2 X^2 X^2  0 X^2 X^2 X^2 X^2  0 X^2  0  0  0  0  0 X^2  0  0  0 X^2  0  0  0  0 X^2 X^2 X^2  0 X^2 X^2 X^2  0 X^2  0 X^2  0 X^2  0 X^2  0  0  0 X^2 X^2 X^2  0  0 X^2 X^2 X^2  0  0  0  0  0 X^2  0  0  0  0  0 X^2  0 X^2 X^2 X^2
 0  0  0  0  0 X^2  0  0  0  0  0  0  0  0  0  0 X^2 X^2 X^2 X^2 X^2 X^2 X^2 X^2 X^2  0  0  0 X^2  0  0 X^2  0 X^2 X^2  0 X^2 X^2 X^2  0  0 X^2  0 X^2  0 X^2 X^2  0 X^2  0 X^2 X^2 X^2  0  0  0 X^2 X^2 X^2 X^2 X^2  0  0  0  0 X^2  0  0  0 X^2 X^2  0 X^2 X^2 X^2  0 X^2  0  0 X^2  0

generates a code of length 81 over Z2[X]/(X^3) who�s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+49x^74+152x^75+435x^76+364x^77+381x^78+334x^79+428x^80+274x^81+319x^82+242x^83+275x^84+202x^85+173x^86+120x^87+107x^88+40x^89+80x^90+42x^91+29x^92+14x^93+22x^94+6x^95+3x^96+2x^97+1x^100+1x^104

The gray image is a linear code over GF(2) with n=324, k=12 and d=148.
This code was found by Heurico 1.16 in 1.15 seconds.