message: remove rad 7 support now
diff: @@ -23,7 +23,7 @@ inline bool SupportedLength(size_t len)
  while(!(p%2)) p /= 2;
  while(!(p%3)) p /= 3;
  while(!(p%5)) p /= 5;
  - while(!(p%7)) p /= 7;
  + //while(!(p%7)) p /= 7;
  if(p == 1)
  return true;
  