Prime Numbers
Prime numbers are numbers that are defined by their factors. Prime numbers only has 2 factors, one and itself. Prime numbers are very useful in mathematics and math students should be familiar with prime numbers.

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What is a prime number? What are prime numbers?
A prime number is a counting number that can be divided evenly by only two numbers which is one and itself. A prime number can be described as a number with exactly two factors, 1 and itself (prime factor).
Is 1 a prime number?
Based on the definition of prime numbers above, 1 is not a prime number since the only factor 1 has is itself. A prime number needs 2 factors, 1 and itself. Therefore, 1 is not a prime number.
List of prime numbers
Below is a list of prime numbers or the first 100 prime numbers.
 2 3 5 7
 11 13 17 19
 23 29
 31 37
 41 43 47
 53 59
 61 67
 71 73 79
 83 89
 97