Code details
best found code with parameters
q=17 k=3 n=256
minimum distance = 240
this is new optimal code
the previous bounds were -1/240
this is a projective code
We used the prescribed group of automorphisms with the following generators
This group makes 11 orbits of sizes:
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4
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64
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4
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64
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32
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64
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4
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64
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4
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The solution of the corresponding linear system of equations was found after less than 100 seconds:
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16
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0
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16
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This produces the following generator matrix
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Which is a code with the following weight distribution
1y256+768x240y16+4096x241y15+48x256