The generator matrix

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

generates a code of length 78 over Z25 who´s minimum homogenous weight is 300.

Homogenous weight enumerator: w(x)=1x^0+1028x^300+440x^302+640x^303+2552x^305+400x^307+420x^308+2144x^310+660x^312+400x^313+2316x^315+720x^317+880x^318+1588x^320+280x^322+160x^323+760x^325+160x^330+32x^335+16x^340+4x^345+12x^350+4x^355+4x^365+4x^370

The gray image is a code over GF(5) with n=390, k=6 and d=300.
This code was found by Heurico 1.16 in 1.82 seconds.