Select 2 unique numbers from 1 to 10000000000000000
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 50,000,000,000,000,002,683,081,102,196,736 (~50000000000000 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 100,000,000,000,000,005,366,162,204,393,472 (~1.0E+14 million trillion)
If order does not matter (e.g. most lottery numbers): 50,000,000,000,000,002,683,081,102,196,736 (~50000000000000 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 100,000,000,000,000,005,366,162,204,393,472 (~1.0E+14 million trillion)