19 is prime.
It is 1 because 19 is a prime number
19 is the only one that only has 1 and itself as factors. It is the prime number.
The number 1 is neither prime nor composite. The numbers 25, 16, 21, and 27 are divisible by factors that are not one or the number itself. 19 is the only one that has only 1 and itself as factors, so it is a prime number.
'19' & '1' , because '19' is a prime number.
A Prime number is a number which can only be divided by 1 and it self to give an integer answer. From the list above the prime numbers would be 1, 3, 7, 11 & 19
Since the only factors of 19 are 1 and 19, it is a prime number. A prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors.
19 is a prime number, so its prime factorization is 1 x 19 or simply 19.
19 is prime the only numebr that is neither prime or composite is 1
1 and 19. It is a prime number.
19 is a prime number. Its only factors are 1 and 19.
19 is a prime number because it has no factors other than 1 and itself.
There are no other whole numbers besides ' 1 ' and 19 that go into 19 evenly. That makes 19 a prime number.