The generator matrix

 1  0  0  0  1  1  1  1  1  1  1  1  1  0  1  1 20  1  5  1  1  1  1  1  1  1 20  1 15  1  1  1  1  1 15  1 20  1  5  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1 10  1  1  1 20  1  1  1  1  1  1  1  1  1
 0  1  0  0 15 20 16 21  1 22 24 12 23  1 13 10  1  4  1  7  7 11 19  2 19  0  1 15  0 23 19  1  4  7  1 11  1  6 15  0 12  8  9  5  2 14  8 14  5 18  1  4 21 22  1 19 18 13  1  7  8  3 12 21 23 11  6 23
 0  0  1  0 16 22  8  1  2  6  7  5 18  4  5 24  1 13  1 15  9 17  2 22 20  4 21  3  1 14  0 16 11 11 20  5 15 13  1 19  8 11 18 10  3  7 22  6 17  6 18  8 10 24  7 21  9 11  5 17 14  0 22  9 23 11 12 24
 0  0  0  1  8 22 13 16  5 17 21  6 10 23  3 22 18  7  9  9 18 11 13 12 10 11 22 19  1  3 18  2 10 21 23  7 21 22  2 18  3 11  9 16  1  7 16  8 20 20  5  5 20  9 11  7 16  2 24  8  0 22  1 18  8 16  1  3

generates a code of length 68 over Z25 who´s minimum homogenous weight is 252.

Homogenous weight enumerator: w(x)=1x^0+1000x^252+1780x^253+1740x^254+1500x^255+1900x^256+5520x^257+5760x^258+5700x^259+4276x^260+5180x^261+12760x^262+10780x^263+10400x^264+8024x^265+8380x^266+21280x^267+16540x^268+16300x^269+13640x^270+13280x^271+27860x^272+23060x^273+20940x^274+15448x^275+14080x^276+28640x^277+21200x^278+15540x^279+10492x^280+8180x^281+15100x^282+9340x^283+6020x^284+2148x^285+1500x^286+2840x^287+1540x^288+860x^289+36x^290+24x^295+20x^300+12x^305+4x^315

The gray image is a code over GF(5) with n=340, k=8 and d=252.
This code was found by Heurico 1.16 in 242 seconds.