Which of the following is a prime number?

A prime number is defined as a natural number greater than 1 that has no positive divisors other than 1 and itself. By examining the choices, we can identify why 5 qualifies as a prime number.

The number 5 can only be divided evenly by 1 and 5, fulfilling the prime number criteria. It cannot be divided by any other integers without resulting in a fraction. In contrast, the other choices present factors that do not meet the prime definition:

• The number 4 can be divided by 1, 2, and 4.

• The number 6 can be divided by 1, 2, 3, and 6.

• The number 8 can be divided by 1, 2, 4, and 8.

Each of these numbers has additional divisors, which disqualifies them from being prime. Thus, 5 stands out as the only prime number among the provided options.