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Earn +20 ptsQ: What numbers plus 47 make a prime number?
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What is P plus P plus N in prime numbers?
It would always be a natural number.
What two numbers does the primorial formula prime number plus or minus 1 produce for prime equals 11 which if either of these numbers is prime?
11# - 1 = 2309 and 11# + 1 = 2311, both of which are prime.
What two numbers does the primorial formula prime number plus or minus 1 produce for prime equals 7 which if either of these numbers is prime?
p7# - 1 = 510509 and p7# + 1 = 510511, neither of which is prime.
Does the sum of two prime numbers equal a prime number?
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.
Is it true that adding any two prime numbers results in a unique number for example 3 plus 7 equals 10 and no other prime numbers can be added together to get 10?
But 5+5 = 10 and 5 is a prime number
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