The generator matrix
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 X X X X X X X 0 0 0 0 0 0 0 1 1 1 1 X 1 1 1 1 1
0 X 0 0 0 X X X 0 0 0 X 0 X X X 0 0 X X 0 X X X X X X 0 0 0 0 0 0 X 0 0 X X X 0
0 0 X 0 X X X 0 0 0 X X X X 0 0 0 X X 0 X X 0 0 0 X X X X 0 0 0 X X 0 X X 0 0 0
0 0 0 X X 0 X X 0 X X 0 0 X X 0 X X 0 0 0 X X 0 X X 0 0 X X 0 X X 0 0 0 X X 0 0
generates a code of length 40 over Z2[X]/(X^2) who´s minimum homogenous weight is 40.
Homogenous weight enumerator: w(x)=1x^0+7x^40+16x^41+7x^42+1x^50
The gray image is a linear code over GF(2) with n=80, k=5 and d=40.
As d=40 is an upper bound for linear (80,5,2)-codes, this code is optimal over Z2[X]/(X^2) for dimension 5.
This code was found by Heurico 1.16 in 0.0102 seconds.