List of primes numbers from 21 to 31
You can use this calculator to get the list of prime numbers from 21 to 31 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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