A prime number is a whole number that has exactly two factors, the number 1 and itself.
This means that the number can only be divided by 1 and itself. The first 5 prime numbers are 2, 3, 5, 7, and 11.
How to check if a number is prime
7 = 1 × 7 and this is the only way we can factor 7. The factors of 7 are 1 and 7, so 7 is a prime number.
13 = 1 × 13 and this is the only way we can factor 13. The factors are 1 and 13, so 13 is a prime number.
Is 1 a prime number ?
The answer is no. Since 1 = 1 × 1, 1 has only one factor.
Is 2 the only even prime number?
The answer is yes.
The next even number after 2 is 4 and 4 has 3 factors (1, 2, and 4).
4 = 1 × 4 and 4 = 2 × 2
Is 0 is prime number?
The answer is no. Since 0 = 0 × 0, 0 has only one factor.
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