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  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  7 29 38 16  9 48  6 21 43  3 23 20 14 15 45 44 13 42 22 24  2 41 28  8 10 37 27  4 46 11 32 39 25

generates a code of length 92 over Z49 who´s minimum homogenous weight is 551.

Homogenous weight enumerator: w(x)=1x^0+1512x^551+588x^552+36x^553+252x^558+12x^595

The gray image is a code over GF(7) with n=644, k=4 and d=551.
This code was found by Heurico 1.16 in 0.119 seconds.