If you have 4 unique digits, otherwise it gets even easier. However, for a 6-digit combination, you'd have to try out 720 combinations in the worst case, so th

If you have 4 unique digits, otherwise it gets even easier. However, for a 6-digit combination, you'd have to try out 720 combinations in the worst case, so that's already quite a bit less feasible. Although given enough time...