Is 5 A Prime Number? Find Out Fast With This Method

A prime number is a whole number greater than $1$ that has exactly two distinct factors: $1$ and itself.

To determine if a number is prime, try dividing it by all whole numbers up to $\sqrt{n}$. If none divide evenly, the number is prime.

Step-by-Step: Is 5 a Prime Number?

We test integers from $2$ up to $\lfloor \sqrt{5} \rfloor = 2$.

Try 2:

$$ 5 \div 2 = 2.5 \quad \text{(not a whole number)} $$

Since there are no integers other than $1$ and $5$ that divide $5$ exactly:

✅ Therefore, $5$ is a prime number.

Final Answer

A prime number has exactly two factors: $1$ and itself.

The number $5$ is a prime number.