A number with only two factors, 1 and itself, is a prime number.
A prime number is a whole number with exactly two factors: 1 and itself.
Two factors of every non-zero number except 1 are 1 and the number itself.
1 and the number itself. These two are always factors.
A number with only two factors - 1 and itself - is known as a prime number.
A prime number has two factors: 1 and the number itself.
Every number greater than 1 has 1 and the number itself as factors. If it has no other factors besides these two factors, it is a prime number. If it has more factors than 1 and itself, it is a composite number.
A prime number has only two factors, 1 and itself.
itself and 1
A number for which the only two factors of the number are itself and 1 is prime.
A prime number has exactly two factors: 1 and itself.
A prime number.