Select 2 unique numbers from 1 to 100000000000000000000000000000000000000000000000000000000000
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 4,999,999,999,999,999,832,824,999,471,636,879,591,620,757,547,431,714,247,293,876,642,114,376,026,137,470,598,410,191,039,245,133,837,347,555,577,757,171,712 (~5.0E+99 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 9,999,999,999,999,999,665,649,998,943,273,759,183,241,515,094,863,428,494,587,753,284,228,752,052,274,941,196,820,382,078,490,267,674,695,111,155,514,343,424 (~1.0E+100 million trillion)
If order does not matter (e.g. most lottery numbers): 4,999,999,999,999,999,832,824,999,471,636,879,591,620,757,547,431,714,247,293,876,642,114,376,026,137,470,598,410,191,039,245,133,837,347,555,577,757,171,712 (~5.0E+99 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 9,999,999,999,999,999,665,649,998,943,273,759,183,241,515,094,863,428,494,587,753,284,228,752,052,274,941,196,820,382,078,490,267,674,695,111,155,514,343,424 (~1.0E+100 million trillion)