What comes next in this sequence of prime numbers? 11, 13, 17, 19, ?

1 Answer
Jul 30, 2018

23

Explanation:

A prime number is a whole number greater than 1 whose only factors are 1 and itself. We just test numbers after 19 to see if they fit this definition. 20 is divisible by 4 and 5, so we can rule it out. 21 is divisible by 7 and 3, so we can rule it out. 22 is divisible by 11 and 2, so we can rule it out.

The first number we come across who fits the definition is 23.