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  5  1  1  1  1  1  1  1  5  1  1  1  5  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  0 15 10 15 20 20 10  5 20  0 20 20 20  0 20 10  0 15 10 15  5  0 10 10  0 15 20  5  5 15  0  5  5 20  0 20 15  5 15  5 10  0  0
 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  5  0 20 20  5 15 15  5  5 10 10 20 20 10  5 15  5 15 15 20  0 20  0
 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 15 10  0 10 15  5  5  0 20 20  0 15 20  5  5  5  5 10 20 20  5  5 10 20 10  5 10 15 20 15 20  0 15 10 10 10 15  0  0 10 20 20  0
 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 10 15 10 20 15 15 20 20 20 20  5  5  0 20  5  0 15 10 15 20 10 10 15  0 10 15 20  0  0 10  0  0 10 10  0 15 10  5 20 15  0 10 15

generates a code of length 76 over Z25 who´s minimum homogenous weight is 280.

Homogenous weight enumerator: w(x)=1x^0+108x^280+368x^285+456x^290+100x^292+392x^295+1200x^297+352x^300+4800x^302+332x^305+6400x^307+244x^310+236x^315+156x^320+116x^325+136x^330+84x^335+84x^340+32x^345+16x^350+4x^355+4x^360+4x^365

The gray image is a code over GF(5) with n=380, k=6 and d=280.
This code was found by Heurico 1.16 in 1.31 seconds.