Question

What is a prime number?

Answer 1

Answer:

Hope it will help you

Step-by-step explanation:

Prime numbers are special numbers that can only be divided by themselves and 1. 19 is a prime number. It can only be divided by 1 and 19. 9 is not a prime number. It can be divided by 3 as well as 1 and 9.

Answer 2

Answer:

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Prime numbers are the positive integers having only two factors, 1 and the integer itself. For example, factors of 6 are 1,2,3 and 6, which are four factors in total. But factors of 7 are only 1 and 7, totally two. Hence, 7 is a prime number but 6 is not, instead it is a composite number. But always remember that 1 is neither prime nor composite.

We can also say that the prime numbers are the numbers, which are only divisible by 1 or the number itself. Another way of defining it is, it is a positive number or integer which is not a product of any other two positive integers. There is no defined formula to find if a number is prime or not (except to a certain range), apart from finding its factors.