The generator matrix

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

generates a code of length 29 over Z2[X]/(X^2) who´s minimum homogenous weight is 30.

Homogenous weight enumerator: w(x)=1x^0+12x^30+1x^32+2x^36

The gray image is a linear code over GF(2) with n=58, k=4 and d=30.
As d=30 is an upper bound for linear (58,4,2)-codes, this code is optimal over Z2[X]/(X^2) for dimension 4.
This code was found by Heurico 1.16 in 0.00194 seconds.