Primes

Helper functions for prime numbers.
Useful for hash table sizes.

		function Prime
	Tests if N is a prime number.
	Param  Type  Description in N  Positive  The number to test. return  Boolean  True if and only if N is prime.

		function Next_Prime
	Returns the smallest prime number that is greater or equal to N.
	Param  Type  Description in N  Positive  Start searching at this number. return  Positive  The smallest prime number >= N.