Joe Pluta wrote:
> Factorials are permutations.  Combinations are "far smaller",
> relatively speaking.  The number of possible combinations of N
> elements is 2^N, or in the case of 100 elements, about a million
> possibilities. 

According to my Windows Calculator 2^100 = 1267650600228229401496703205376

2^30 is just over a billion.
2^20 is just over a million.


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