Yes because they only have two factors each
The numbers 23, 29, 31 and 37 are prime.
23, 31
They are: 23, 29 and 31
23 29 31.
The prime numbers between 23 and 49 are: 23, 29, 31, 37, 41, 43, 47
There are four prime numbers between 20 and 40
The prime numbers from 21 to 40 are 23, 29, 31, and 37.
23 29 31 37.
23, 29 & 31.
23, 29 and 31
23, 29, and 31
23 29 31 37.