The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  7  1  1  1  1  1  1  1 21  1  1  1  1  1  1  1 14  1  1  1  1  1  1  1 42  1  1  1  1  1  1  1 28  1  1  1  1  1  1  1 35  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 36 31 16 48  4 19  7 29 38  9  6 46 26  1 21 43  3 23 20 11 40  1 14 15 45 44 13 32 33  1 42 22 24  2 41 39 12  1 28  8 10 37 27 25 47  1 35  1 17 30 34 18  5  1  0 36 31 16 48  4 19  7 29 38  9  6 46 26 21 43  3 23 20 11 40 14 15 45 44 13 32 33 42 22 24

generates a code of length 87 over Z49 who´s minimum homogenous weight is 519.

Homogenous weight enumerator: w(x)=1x^0+672x^519+630x^520+294x^522+18x^525+504x^526+252x^527+24x^532+6x^560

The gray image is a code over GF(7) with n=609, k=4 and d=519.
This code was found by Heurico 1.16 in 0.0965 seconds.