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Harley

**Prime Number** A positive integer which has only 1 and the number itself as factors. For example, 2, 3, 5, 7, 11, 13, etc. are all primes. By convention, the number 1 is not prime. 20 i can think of 1,2,3,5,7,11,13,16,19,21,23,27,29,31,33,37,39,41,43,47

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