There are four pairs of prime integers whose sum is 80.
They are:
(7, 73)
(13, 67)
(19, 61)
(37, 43)
17 and 3 are two prime numbers whose sum is 20. Their product is 51.
Two and 73.
2 and 467 are two prime numbers whose sum is 469.
There are no such numbers.
3 and 17
They are 13 and 17
37 and 5
17 and 19
23 and 29
There are no two primes whose sum is 209.
23 and 29
They are: 29+19 = 48