23 and 29 are prime.
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The prime factors of 30 are 2, 3 and 5. The prime factors of 40 are 2 and 5. The prime numbers between 30 and 40 are 31 and 37.
The prime numbers between 20 and 30 are 23 and 29.
The numbers 23 and 29 are the only prime numbers between 20 and 30
23 and 29 are the prime numbers between 20 and 30.