2 3 5 7.
19 is prime.
The number 19 it is between 18 and 20 and is a Prime Number.
19 is a prime.
It is 23
19 is a prime number, so it has no prime factorization.
19 is a prime number.19 is a prime number.19 is a prime number.19 is a prime number.
19
19
17... and 19 !
19 is the prime number.
19 is a prime number.
19 is a prime number