Some pairs of prime numbers are:
3, 5
11, 17
7, 23
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If you mean consecutive numbers that are prime? than the answer is 2,3 are consecutive numbers which are prime. except for this pair it is impossible for consecutive numbers to be prime because every second number is multiple of 2
Prime numbers are positive integers with only two factors. 2, 3, 5 and 7 are examples of prime numbers.
Any pair of prime numbers as for example 19 and 23
9 is not a prime. 73 is a prime.
Prime numbers are divisible because any numbers that are divisible are prime. If a number isn't divisible, it isn't prime. Prime numbers have to be divisible by at least one pair of numbers to be prime.