it is infinite
All pairs of two primes are coprime. There are fifteen primes under 50. So that means there are 105 unique pairs of "coprime primes", or more generally, pairs of primes, under 50.
There are 731 pairs.
There are four pairs of twin primes between 2 and 35: (5,7) (11,13) (17,19) (29,31).
There are for pairs of co-primes between 1 and 25. They are (3, 5), (5, 7), (11, 13), and(17, 19).
Yes.
25 pairs, including the pair (2, 3).
There 4 pairs of primes that can give a sum 40 in addition. They are (3,37), (11,29), (17,23),(19,21).
2 and 3
They are called twin primes and there are thought to be infinitely many such pairs.
There is only 1 pair of primes and they are 2*5.
The two pairs 59 & 61, 71 & 73.
301