In nomal senary, yes. However, this is bijective senary, which means there's no zero. Instead of the digits 0-5, you have 1-6 (plus theta to represent null but that only comes in at the elite tasks). So instead of 1, 2, 3, 4, 5, 10, 11, etc. you have 1, 2, 3, 4, 5, 6, 11, 12, etc.
It's weird but that's just how I invented this game I guess. It's an oldie.