Is 75 prime or composite? Prealgebra Factors and Multiples Prime Numbers 1 Answer Shwetank Mauria Apr 9, 2016 #75# is a composite number. Explanation: Factors of #75# are #{1,3,5,15,25,75}#. As #75# has factors other than one and itself, it is not prime but composite number. Answer link Related questions Are prime numbers infinite? Is 81 a prime number? Is 0 and 1 a prime number? What are prime numbers? Is 89 a prime number? Is 10 a prime number? Is 69 a prime number? What is a co-prime number? Is 35 a prime number? Is 42 a prime number? See all questions in Prime Numbers Impact of this question 8426 views around the world You can reuse this answer Creative Commons License