### Home > CCA > Chapter 4 > Lesson 4.1.1 > Problem4-13

4-13.

A prime number is defined as a number with exactly two integer factors: itself and $1$. Jeannie thinks that all prime numbers are odd. Is she correct? If so, state how you know. If not, provide a counterexample.

List the first 5 prime numbers.

$2,3,5,7,11$

$2$ is an even number.