The generator matrix

 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  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  5  0  0  0  0  0  5  5 20 10 15 20 15 15 15 10 10  0  0 10 10 15 15 10 10 10  0  0 10 15 20 15 15  0 10 15 20 20 10  5 20  0 20 20 20  0 20 10  0 15 10 15 15 10  0 10 10 20  0 20  5  0 20 15 15 10 15 15 15  0 20  0 15 10  0  5
 0  0  5  0  0  5  5 15 20 15  0  5 10 10 20  0 20  5  5  0  5 15  5 15 20  0 10 10 10  5 20 20  5 15 15 20 10 20  5  0  5  0  0  0  5  0 10  0 10 10 10 15 10 10 10  5 20 20  5  5  5  0 15 15  0  5 20 15 20  0  5 15 20 20 10 15 15
 0  0  0  5  0 15 10 15  5  5 20  5  0  5 10  5  5 10 15 10  5  0  5 20 15 10 20 10 15 10 10 20  0 10 15  0 10 15  5  5  0 20 20  0 15 20  5  5  5  5 10 20 20 15 10 10 10 20 10  0 10 15  0  0  0  0 10  0  5  5 10 20  5  5  0  0  5
 0  0  0  0  5 15  5 20 15  5 15 20 10  0  0  5  0 15 10  5  5 20  5 10  0 20  0 20  5 20  5 10 20 15 10 10 20 15 15 20 20 20 20  5  5  0 20  5  0 15 10 15 20  0  0 20 15  0 20 10 15  0 15 10  0  0 10 20 15 20  0 10 20 10 15  5 15

generates a code of length 77 over Z25 who´s minimum homogenous weight is 285.

Homogenous weight enumerator: w(x)=1x^0+164x^285+432x^290+400x^295+412x^300+340x^305+12500x^308+288x^310+316x^315+140x^320+168x^325+124x^330+136x^335+92x^340+60x^345+24x^350+16x^355+8x^360+4x^385

The gray image is a code over GF(5) with n=385, k=6 and d=285.
This code was found by Heurico 1.16 in 1.33 seconds.