Prime numbers have exactly two numbers. There is theoretically an infinite number of them.
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All numbers that have exactly two factors are prime numbers whereas composite numbers have more than two factors.
A prime number has exactly two factors: itself and 1.
4, 9, 25 and 49 They are squares of prime numbers.
64, 729, 15625 and so on. Prime numbers to the 6th power.
Prime numbers like 2, 3, 5 and 7