Prime number + 2 = Prime number

06242016, 07:53 PM
(This post was last modified: 06242016 08:15 PM by Ivan Rancati.)
Post: #1




Prime number + 2 = Prime number
EDIT: oops. Twin primes, plenty of study on that already. Sorry for the old news
I read this riddle in a 1950s encyclopedia (in Italian), and it piqued my interest. Adding some prime numbers to 2 still yields a prime number For example 3, 5 5, 7 11, 13 17, 19 41, 43 and so on How could one possibly go about proving that there is an infinite number of these "prime pairs", or that past a certain prime number there is never going to be such a pair? I would imagine there is already some conjecture about this, but not sure cheers Ivan 

« Next Oldest  Next Newest »

Messages In This Thread 
Prime number + 2 = Prime number  Ivan Rancati  06242016 07:53 PM
RE: Prime number + 2 = Prime number  Ron Ross  06242016, 08:17 PM
RE: Prime number + 2 = Prime number  Vtile  06242016, 09:52 PM
RE: Prime number + 2 = Prime number  John R  06242016, 11:26 PM
RE: Prime number + 2 = Prime number  Vtile  06252016, 12:52 AM

User(s) browsing this thread: 1 Guest(s)