Posted in Web Is 23 a Prime Number | or is 23 a Composite Number? – Smartick July 17, 2026 Yes, 23 is a prime number and not a composite number. As a number greater than 1, 17 has only two factors: 1 and 17, of course, making it a prime. https://www.smartick.com/lp/is-23-a-prime-number/