Question

Greta said that the product of two prime numbers must also be a prime number. Joan disagreed. Who is correct?

Answer 1

Try multiplying some of these prime numbers.

http://www.mathsisfun.com/prime_numbers.html

What do you think?

Answer 2

By definition, the product of two numbers other than 1 cannot be a prime. And, since 1 is not a prime number, the product will have two factors, so it cannot be prime!

Answer 3

This really helped me.

Answer 4

This really helped me. Thank you.

Answer 5

So it can not have a prime+a prime and get a prime?

Answer 6

Joan

Answer 7

It can be the one is prime so the other can prime to because you can use prime factorization to know what is the true answer to be a prime