The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  0  1  1  1  1  1  1  1  1  1  1  7  1  1  1  1  1 14  1  1  1  1 28  1  1  1  1  7  1  1  1  1  1  1  1  1  1 28  1  1  1  1 21  7  1  1  1  1 14  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1
 0  1  1 31 16 48  4 19  0 36 31 16 48  4 19  1 19 16 48 36  4  1  0 31 36 26 38  7  6 46 29  9  1 38  7  9 43  6  1 40 21 27  9  1 46 40 38  8  1 38 43 20 39 27  1 23  3  4  1 20 22 14 10  1  1 13 20  3 31  1 19 35  1 30 33 45 46 43 43 17  3  8 25  1  1 48 18 43 20 31  4
 0  0 35  0 35  7 35  7 42 14  7 42  0  0 42 14 21 28 14 21 42 14 21  0 14 42 35 28 21 14  7 28 35 14 14 21 42 21 42 28 35  7 21  7  7 35 35 14 42  7  7 42 28  0 42 42 14  7  0 28 28 28 35 21 21 14 42 21 21 28 21 14 35 21  7 28  7 21  0 28 28  7 42 21 42 14 14  0 35 42  7
 0  0  0  7 28 28 21 42  0 42  7 42 35 28 21 21 42 21 35 35 14  0 42 14  7 35 35 28 28 21 14  0 42 21 14  7 42  0 28 14  7  0 21 35 14 42 14 14 35 21  7  7 42  7 21 14 35 28 28  7 35 42  0 21  0 28  0  7  0 21 28  0 14  0 35 21  0 14  7 28 42 21 28 21  7 14  7 42 35 14 42

generates a code of length 91 over Z49 who´s minimum homogenous weight is 520.

Homogenous weight enumerator: w(x)=1x^0+42x^520+126x^522+84x^523+168x^524+456x^525+1344x^526+924x^527+756x^529+1302x^530+1806x^531+474x^532+6174x^533+2226x^534+2184x^536+2436x^537+2100x^538+348x^539+11004x^540+2814x^541+3822x^543+3444x^544+4116x^545+318x^546+21462x^547+3612x^548+4788x^550+4872x^551+4158x^552+216x^553+16128x^554+3486x^555+2730x^557+2268x^558+2058x^559+186x^560+1512x^561+1302x^562+96x^567+84x^574+60x^581+54x^588+18x^595+54x^602+12x^609+24x^616

The gray image is a code over GF(7) with n=637, k=6 and d=520.
This code was found by Heurico 1.16 in 22.7 seconds.