• A prime number has no whole number factors other than 1 and itself.
  • 5 is a prime number because only 1 and 5 divide 5 evenly.
  • 9 is not a prime number because 3 X 3 = 9.
  • The first ten prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29.
  • There is no pattern or formula for counting indefinitely by primes.
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