1. Prime and composite numbers

2. Prime Numbers
Positive Numbers that only have two factors which are 1 and its self 7 5
593
3571
NOT 1

3. Composite Numbers
Positive Numbers that are greater than 1 that is not prime 6 27 99
3468
Not 1

4. No factors so it is prime
Is this number prime?
Factoring
Can you?
Or cant you?
Ex: 45
5 * 3 * 3 57
3 * 19 59
No factors so it is prime

5. If the number is not Prime
Then it might be composite
If it is greater than 1
Not if its is 1
Not if it is negative

6. Uses of Prime numbers Factoring RSA encryption
Easy if you see the number is prime then I cannot be done
RSA encryption
Send and receive encrypted messages that no one else can read