The generator matrix

 1  0  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1  X  1  1  1  1  X  1  1 3X  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  1  1  2 3X+4  3  0 3X+1  2  1 3X+4  3  X X+2 4X+4  X 3X+1 X+3  1 4X+1 X+2 4X+4 X+3  1  1 X+4  1  0 3X  2 3X+2  3 3X+3 3X 3X+2 3X+3 4X+1 X+1 2X+4 X+4  X 2X+2 3X+3 X+1 2X+4 2X+2 2X 4X+1 4X+4 X+3 X+4 3X 3X+1 2X+2 2X+3 2X  1 3X+2 2X+3  4 X+2 2X 3X+1 3X X+1 3X+2  1  0  2
 0  0 3X 2X  X  0 4X 2X  X 2X 3X 4X 2X 3X 4X  X  0 3X 4X  X 4X  0 2X 3X 4X 2X  X 3X 4X  0  X  X  0  X 4X 2X 2X 3X  0  X  0 2X 3X  0 4X 3X 3X 4X 2X  X 3X 2X  X  0 4X  0  0 3X  X 2X 2X  X 3X 3X  X  0 2X 2X 4X

generates a code of length 69 over Z5[X]/(X^2) who´s minimum homogenous weight is 270.

Homogenous weight enumerator: w(x)=1x^0+380x^270+200x^271+560x^272+844x^275+100x^276+240x^277+196x^280+200x^281+40x^282+72x^285+160x^287+128x^290+4x^320

The gray image is a linear code over GF(5) with n=345, k=5 and d=270.
This code was found by Heurico 1.16 in 0.0602 seconds.