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It is: 11 and 143/11 = 13 wich is also a prime number
The lowest prime number is two, because it is the smallest integer that divides by 1 and by itself and not by a third integer. You see, a prime number is a number that only has two factors, one and itself. Many people think one is the smallest prime number but no it isn't. It only has one factor not two factors so it is a perfect number. a prime has exactly two factors.
Two number are co-prime if there is no whole number other than 1 that divides them both exactly
It is 13.It is 13.It is 13.It is 13.