The generator matrix

 1  0  0  0  0  0  1  1  1  0  1  X  1  0  X  X  1  X  1  1  1  X  X  1  X  X  1  1  0  0  1  X  0  0  0  1  X  1  1  0  1  1  1  X  1  1  X  0  0  1  X  0  1  X  1  1  1  X  1  0  1  1  1  1  0  1  X  X  0  1  1  1  1
 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 X+1  1  1  1  1 X+1  1 X+1  1  1  1 X+1 X+1  1 X+1  1  1  1  1  1  X  1  1  1  1  0  X  X X+1  0  X  1  0  1  X  0  1  X  0 X+1  X  1  0
 0  0  1  0  0  0  0  0  X  X  1  1 X+1  1  X  1  X  1  X  1 X+1  1  0  X  0  1  1  0 X+1  X  1 X+1  0 X+1  1  0  X  1  1  X  1 X+1  X  X  0  X  0  X  X  X  0  1  1  X  X  1  1  X  0  0  1 X+1  0  1  1 X+1  0  1  X  X  0 X+1  0
 0  0  0  1  0  0  X  1 X+1  1  0  1  1 X+1  1 X+1  1  0  0 X+1 X+1  0  1  X  X X+1  0 X+1  1  0  X  1 X+1  X  0  1  X X+1  1 X+1  1  1  X  0  1  X  0  1  1 X+1  X X+1  0  0  1  1  1  1  X  X  0  0  1  0 X+1 X+1 X+1  0  1 X+1  1  0  X
 0  0  0  0  1  0 X+1  1  0  1  X X+1 X+1  1  X  0  0 X+1  1 X+1  0  X X+1  0  1  X X+1  1  X  0  0  1  X X+1  1  X  1  1 X+1  X  X  0 X+1 X+1  0 X+1  0 X+1  1  1  1 X+1 X+1  1  X X+1  X X+1  0  1  1  0  0  1  0  X  X  X  1  0  X  1  1
 0  0  0  0  0  1  1  X  1  1 X+1  X  1 X+1 X+1  X  0  0  X  X X+1  1  0  1  1 X+1  X  1  X X+1 X+1 X+1  X  0  1  0  1  1  X X+1  1  0  X  X X+1 X+1 X+1  1  X  X X+1  0 X+1 X+1  0  0  X  X  1  1 X+1  X  1  X  0 X+1  1  X  0 X+1  0  X  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+60x^63+145x^64+210x^65+212x^66+236x^67+264x^68+240x^69+223x^70+244x^71+216x^72+206x^73+236x^74+186x^75+230x^76+198x^77+164x^78+178x^79+140x^80+116x^81+92x^82+94x^83+82x^84+50x^85+27x^86+22x^87+10x^88+4x^89+4x^90+4x^91+2x^94

The gray image is a linear code over GF(2) with n=146, k=12 and d=63.
This code was found by Heurico 1.16 in 3.91 seconds.