Why is 117 not a prime number

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Study Guides. Trending Questions. Which algebraic expression represents this word description: the quotients of four and the sum of a number and three? Which of the following happens when a cell divides by mitosis? Still have questions? Find more answers. Previously Viewed. How do you know that is prime or composite? Let us first understand what makes a number 'prime'.

If a number has only 2 factors 1 and the number itself , then it is a prime number. If the number has more than 2 factors, then it is composite. Now, what do you think of ? Let's study this in detail. No, is not a prime number. The number is divisible by 1, 3, 9, 13, 39, For a number to be classified as a prime number , it should have exactly two factors.