Select 2 unique numbers from 1 to 1000000000000000000000000000000000000000000000000000000000000000000000000000000
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 499,999,999,999,999,991,679,590,111,595,860,857,280,186,137,508,735,268,183,503,807,230,234,208,750,506,277,265,738,938,472,969,370,875,618,694,172,181,552,533,767,253,674,082,286,866,732,755,185,163,042,816 (~5.0E+137 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 999,999,999,999,999,983,359,180,223,191,721,714,560,372,275,017,470,536,367,007,614,460,468,417,501,012,554,531,477,876,945,938,741,751,237,388,344,363,105,067,534,507,348,164,573,733,465,510,370,326,085,632 (~1.0E+138 million trillion)
If order does not matter (e.g. most lottery numbers): 499,999,999,999,999,991,679,590,111,595,860,857,280,186,137,508,735,268,183,503,807,230,234,208,750,506,277,265,738,938,472,969,370,875,618,694,172,181,552,533,767,253,674,082,286,866,732,755,185,163,042,816 (~5.0E+137 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 999,999,999,999,999,983,359,180,223,191,721,714,560,372,275,017,470,536,367,007,614,460,468,417,501,012,554,531,477,876,945,938,741,751,237,388,344,363,105,067,534,507,348,164,573,733,465,510,370,326,085,632 (~1.0E+138 million trillion)
