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Prime Numbers and Prime Factorization

🎬 Video Tutorial

  • (0:01) Definition of Prime Numbers: Prime numbers have exactly two factors (1 and the number itself). 1 is not a prime number, and 2 is the smallest prime number.
  • (0:46) Common Prime Numbers under 20: 2, 3, 5, 7, 11, 13, 17, 19
  • (0:58) Prime Factorization: Expresses any number as a product of prime factors. For example, 90 can be factorised $2 \times 3^2 \times 5$.
  • (2:19) Methods of Prime Factorization: Use the division method or create a factor tree method to break down numbers visually into their prime factors.

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