6 + 47 = 53
It would always be a natural number.
11# - 1 = 2309 and 11# + 1 = 2311, both of which are prime.
p7# - 1 = 510509 and p7# + 1 = 510511, neither of which is prime.
If one of the two numbers is 2, the sum of two prime numbers may sometimes be a prime number. Examples of this are 2 + 11 = 13, 2 + 521 = 523, 2 + 281 = 283. There are an infinite number of similar examples where the sum of 2 plus a prime is another prime. However if neither number is 2, then the sum of two prime numbers is always an even number greater than 2 and therefore composite.
The numbers are 13 and 41. And you do not need to know that they are prime in order to find the answer. The sum (54) and difference (28) provide all the necessary information.
a prime number is a number that you can plus by one
It would always be a natural number.
They are 23 plus 7 = 30
NO!!!! Other than '2' all prime numbers are odd numbers. 4,6,10 & 20 are all even so they are not prime numbers.
11# - 1 = 2309 and 11# + 1 = 2311, both of which are prime.
p7# - 1 = 510509 and p7# + 1 = 510511, neither of which is prime.
If one of the two numbers is 2, the sum of two prime numbers may sometimes be a prime number. Examples of this are 2 + 11 = 13, 2 + 521 = 523, 2 + 281 = 283. There are an infinite number of similar examples where the sum of 2 plus a prime is another prime. However if neither number is 2, then the sum of two prime numbers is always an even number greater than 2 and therefore composite.
If the two prime numbers are different: You get the two prime numbers, plus 1, plus the product. For example, if you multiply 2 x 3 = 6, the factors of 6 are 2, 3, 1, and 6. If the two prime numbers are the same: You get the prime number, 1, and the product. For example 2 x 2 = 4. The factors of 4 are 2, 1, 4.
The numbers are 13 and 41. And you do not need to know that they are prime in order to find the answer. The sum (54) and difference (28) provide all the necessary information.
But 5+5 = 10 and 5 is a prime number
2 + 3 = 5 Two plus any odd prime number is odd.
When X and Y are prime numbers X + Y is even unless either X or Y = 2. (As 2 is the only even prime number)