It is indeed, 2^64. Here is a good explanation of the Birthday Paradox that sheds some light on this. http://betterexplained.com/articles/understanding-the-bi

It is indeed, 2^64. Here is a good explanation of the Birthday Paradox that sheds some light on this. http://betterexplained.com/articles/understanding-the-birthday-paradox/ http://betterexplained.com/articles/understanding-the-birthd...