A composite number is a positive integer greater than 1 that has more than two factors. In other words, it is a number that can be divided evenly by numbers other than 1 and itself.

Key points:

• A composite number has at least one divisor other than 1 and itself.
• It is not a prime number.
• Examples of composite numbers:
  • 4 (divisible by 1, 2, and 4)
  • 6 (divisible by 1, 2, 3, and 6)
  • 9 (divisible by 1, 3, and 9)

Contrast with prime numbers:

• A prime number has exactly two factors: 1 and itself.
• A composite number has more than two factors.

If you want, I can also explain how to identify composite numbers or provide more examples!