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

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