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What's a Prime Number?

A prime number is a number greater than 1 whose only factors are 1 and itself.

Summary

  1. If 'x' is prime, x is greater than 1
  2. This means all primes are positive
  3. The factors of 'x' are 'x' and 1
  4. 2 is prime!
  5. 3 is prime!
  6. 5 is a prime too!
  7. 7, 11, 13, 17, 19 are all also primes because they are positive, and their factors are just themselves and 1

Notes

    1. If 'x' is prime, x is greater than 1
    2. This means all primes are positive
    1. If 'x' is prime, x is greater than 1
    2. This means all primes are positive
    3. The factors of 'x' are 'x' and 1
    1. 2 is positive, is it prime?
    2. 2 is a prime number because its only factors are 2 and 1
    1. Is 3 a prime number?
    2. Yes, 3 is a prime number because its only factors are 3 and 1
    1. Is 4 a prime number?
    2. No, 4 is not a prime number because its factors are 1, 2, and 4
    3. 4 needs to only have itself and 1 as primes, not 2
    1. Is 5 a prime number?
    2. Yes, 5 is a prime number because its only factors are 5 and 1
    1. 7, 11, 13, 17, 19 are all aslo primes because they are positive, and their factors are just themselves and 1