Properties Of Co-prime Numbers: • All prime numbers are co-prime to each other. • Any 2 consecutive integers are always co-prime. • Sum of any two co-prime numbers is always co-prime with their product. • 1 is co-prime with all numbers. • a and b (natural numbers) are co-prime only if the numbers 2a-1 and 2b-1 are co-prime.

Novak has started his 300th week at No. 1 and now only record-holder Roger Federer is ahead of him for most weeks spent at No. 1. If Djokovic maintains his position, he will pass the Swiss star on 8 March 2021. The only one pair of consecutive prime numbers possible are 2 and 3. After these very two numbers, every even number is a multiple of two. Furthermore, after 10, every number ending if five is a ...