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  1  1  1  1  1  1  7  1  1  1  1  1  1  1  1  1  7  1  1  1 14  1  1  1  1  1  1  1  1  7  1  1  1  0  1  1  1  1  1  1 21  1  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 11 38 26  6 41  9  7  1  9 47 32  6  9  6 32 38 23  1 14 48  3  1 32 19  7 38 16 22  5  0  1 29 31 27  1 36  7 15 11 33 23  1 43 33 23 10 46 21  0
 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 35 28  0 28  7 14 28 28 28  7 28 28 14 21  0 42 42  0 21  0 42 28 28 35  7 35 42  7 35 21 35  0 21 21  7 21 35  7  7 21 14 42 21 14  7 14 21  7  0
 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  7  0  0 42 21 14 14 21  0 35  7  7  0 21 42 14 21 14  0 28 28  7 42  0 28 28  7  7 42 14 42  7 28  0 42 21  7 35 14 28 35 14 14  7 21 14 21  7  0

generates a code of length 80 over Z49 who´s minimum homogenous weight is 455.

Homogenous weight enumerator: w(x)=1x^0+126x^455+252x^456+378x^461+4464x^462+1008x^463+1764x^468+12150x^469+2058x^470+3024x^475+20526x^476+3192x^477+5670x^482+32394x^483+4788x^484+3570x^489+18738x^490+3108x^491+126x^497+78x^504+48x^511+30x^518+48x^525+30x^532+60x^539+6x^546+12x^553

The gray image is a code over GF(7) with n=560, k=6 and d=455.
This code was found by Heurico 1.16 in 7.86 seconds.