Prime Numbers

What is a prime number?
A prime number is a number whose only factors are 1 and itself.
Note that 2 is the only even prime number, because every other even number is a multiple of 2. What is the first prime number?

2.

Why not 1?
1 only has 1 factor: 1
Here is a list:
2,3,5,7,11,13,17,etc...

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