The generator matrix

1 0 0 0 0 0 1 1 1 X 1 1 0 1 X X 0 1 1 1 0 X 1 X 1 1 0 1 0 1 1 1 1 1 0 X 1 0 1 X X 1 1 X 1 0 1 X 1 0 1 X 1 1 0 1 1 1 0 1 1 X 1 0 X 0 X 1 0 1 X X 0
0 1 0 0 0 0 0 0 0 0 0 0 X 0 0 0 0 0 X X X X 0 X X X 0 1 1 1 1 X+1 1 1 1 1 X+1 1 1 1 1 X+1 X+1 1 X+1 1 1 1 1 1 X 1 1 X+1 1 0 X X 1 0 X 1 0 1 X 1 1 0 1 1 1 1 0
0 0 1 0 0 0 0 0 X X 1 1 1 1 X 1 X X+1 X X+1 1 1 0 X 0 X+1 1 0 X+1 X X+1 1 0 X+1 1 0 X X+1 1 X 1 X+1 X X 0 X 0 X X X 0 1 1 X X X+1 1 X 0 0 1 X+1 0 1 1 0 1 1 1 X+1 0 X 1
0 0 0 1 0 0 1 X 1 1 0 X+1 1 1 1 0 X 0 X 0 X+1 1 X 1 1 X+1 X X+1 0 X+1 1 X+1 0 0 1 X X+1 1 0 1 X+1 X X X 1 X+1 X+1 X+1 0 0 1 X X+1 1 X X 0 0 X+1 X+1 X+1 X 1 X X X 0 X X X X+1 X 1
0 0 0 0 1 0 1 X+1 0 1 X X+1 1 1 X 1 1 X+1 1 X 0 1 0 X+1 X X X+1 1 1 X+1 1 1 1 X+1 X X+1 X 1 0 0 X 1 X+1 1 0 X X+1 1 0 X 0 0 X X 1 X 1 X 1 X 0 0 X 1 X+1 0 X+1 1 X 1 X+1 X+1 X+1
0 0 0 0 0 1 X 1 1 X+1 1 X+1 0 0 1 X 1 X+1 X X X X+1 X+1 X 0 0 1 1 X 0 X+1 0 X+1 1 X+1 X+1 X 0 0 X+1 X X 0 X X+1 X X 1 X+1 1 0 X X+1 0 X+1 0 0 1 0 0 X+1 X+1 1 1 X X X+1 1 X X X+1 1 0

generates a code of length 73 over Z2[X]/(X^2) who´s minimum homogenous weight is 63.

Homogenous weight enumerator: w(x)=1x^0+92x^63+152x^64+160x^65+205x^66+200x^67+259x^68+272x^69+263x^70+260x^71+202x^72+228x^73+204x^74+226x^75+204x^76+170x^77+190x^78+134x^79+139x^80+120x^81+117x^82+94x^83+57x^84+68x^85+43x^86+18x^87+10x^88+4x^89+2x^90+2x^93

The gray image is a linear code over GF(2) with n=146, k=12 and d=63.
This code was found by Heurico 1.10 in 1.72 seconds.