Select 2 unique numbers from 1 to 400000000000000000000000000000000000000000000000000000000000000000000000000
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 79,999,999,999,999,992,561,283,058,893,183,981,532,593,662,032,388,661,823,957,129,227,868,769,189,186,418,295,409,645,567,939,565,131,713,877,771,965,110,254,049,874,535,583,976,605,890,031,648,768 (~8.0E+130 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 159,999,999,999,999,985,122,566,117,786,367,963,065,187,324,064,777,323,647,914,258,455,737,538,378,372,836,590,819,291,135,879,130,263,427,755,543,930,220,508,099,749,071,167,953,211,780,063,297,536 (~1.6E+131 million trillion)
If order does not matter (e.g. most lottery numbers): 79,999,999,999,999,992,561,283,058,893,183,981,532,593,662,032,388,661,823,957,129,227,868,769,189,186,418,295,409,645,567,939,565,131,713,877,771,965,110,254,049,874,535,583,976,605,890,031,648,768 (~8.0E+130 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 159,999,999,999,999,985,122,566,117,786,367,963,065,187,324,064,777,323,647,914,258,455,737,538,378,372,836,590,819,291,135,879,130,263,427,755,543,930,220,508,099,749,071,167,953,211,780,063,297,536 (~1.6E+131 million trillion)