Actually since these are signed longs it only goes up to 2^31-1, which is a prime, a Mersenne Prime actually. (For those that missed this bit, a Mersenne prime is any prime expressable in the form 2^N-1.)

I dont know if I'm the only one that finds it interesting that the highest number you can represent with a long is a prime, but I do. :-)

Now if only they would use questions like this on pub-quizzes. :-)

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$world=~s/war/peace/g

In reply to Re^3: Simple primality testing by demerphq
in thread Simple primality testing by ambrus

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