The generator matrix

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

generates a code of length 77 over Z2[X]/(X^3) who�s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+57x^70+182x^71+258x^72+534x^73+290x^74+484x^75+209x^76+422x^77+231x^78+350x^79+203x^80+280x^81+142x^82+154x^83+70x^84+84x^85+43x^86+44x^87+14x^88+18x^89+4x^90+2x^91+13x^92+6x^93+1x^94

The gray image is a linear code over GF(2) with n=308, k=12 and d=140.
This code was found by Heurico 1.16 in 1.05 seconds.