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List of primes numbers from 21 to 39

Primes Before Primes Between Composites Before

   
Ex.: 1 to 100, etc.

Answer
There are 4 prime numbers between 21 and 39.

They are:

23293137

There is 1 tween prime between 21 and 39.

The folowing is the set of tween primes between 21 and 39:

(29,31);

The sum of prime numbers between 21 and 39 is 120.

The average of prime numbers between 21 and 39 is 30.

The product of prime numbers between 21 and 39 is 7.6505 × 105.

Note: this calculator also includes the starting and the ending number, which form the interval, if they are primes.

You can use this calculator to get the list of prime numbers from 21 to 39 or between any two specified numbers, including them.

What is a prime number?

A prime number is a number which is only divisible by and itself.

Among mathematicians, 1 is universally regarded as non-prime.

Zero has an infinite number of factors; thus not prime or composite.

Definition of tween primes or what are tween primes?

For a pair of primes to be Twins, they must obey the following rule.

If i and j are twin primes, then both i and j must be individually primes and also should differ by 2, i.e. (i−j) = 2 or (j−i) = 2

Examples of tween primes sets (pairs):

(3,5); (5,7); (11,13); (17,19); (29,31); (41,43); (59,61); (71,73);

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