19 is prime
9 = 3 x 3
19 is the prime number.
19 is prime.
9 is the prime number.
No 19 is a prime number.
19 is the prime number out of the provided choices.
19 is the prime number.
19 is the only one that only has 1 and itself as factors. It is the prime number.
19 YES, 19 is prime because 2,3,4,5,6,7,8,9,do not go in to 19. I stop at nine because 18 is one under 19 and 9 x 2=18. The only factors of 19 are 1 and itself, making it a prime number.
19
19
19 is a prime.
19 is a prime number, so it has no prime factorization.