What is a Prime Number? (with Example)

• Example of a Prime: The number 7 is prime. Its only factors are 1 and 7.
• Example of NOT a Prime: The number 6 is not prime. Its factors are 1, 2, 3, and 6. Because it has more than two factors, it is called a "composite number."

Key Points:

• The number 1 is not a prime number because it only has one factor (itself).
• The number 2 is the only even prime number. All other even numbers are divisible by 2, so they have at least three factors (1, 2, and themselves).