The generator matrix

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

generates a code of length 88 over Z49 who´s minimum homogenous weight is 518.

Homogenous weight enumerator: w(x)=1x^0+2010x^518+630x^519+2394x^520+2988x^525+714x^526+2016x^527+1446x^532+210x^533+252x^534+2106x^539+504x^540+1512x^541+6x^546+6x^553+12x^560

The gray image is a code over GF(7) with n=616, k=5 and d=518.
This code was found by Heurico 1.16 in 22.3 seconds.