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by Tuna-Fish 4140 days ago
120 are the combinations if you only use 5 characters and just modify the order. However, if you allow the amount of characters to vary, and allow duplicates, you can represent any number you want. As it's a 5-bit number system, the count of distinct possibilities is 5^n for amount of numbers, or with just 10 digits, you can fit any 32-bit integer there. Plenty good enough for tracking.