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  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  7 29 38  9  6 46 21 43  3 23 20 11 14 15 45 44 13 32 42 22 24  2 41 39 28  8 10

generates a code of length 89 over Z49 who´s minimum homogenous weight is 532.

Homogenous weight enumerator: w(x)=1x^0+648x^532+756x^533+588x^534+270x^539+126x^540+12x^574

The gray image is a code over GF(7) with n=623, k=4 and d=532.
This code was found by Heurico 1.16 in 0.105 seconds.