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'''Twin primes''' are pairs of prime numbers separated by only 2.
'''Twin primes''' are pairs of [[prime number]]s whose [[difference]] is 2.
The smallest twin primes are (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43).
The smallest twin primes are (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43).
Proving that there are infinitely many twin primes (the [[twin prime conjecture]]) is one of the great unsolved problems in [[mathematics]].
Proving that there are infinitely many twin primes (the [[twin prime conjecture]]) is one of the great unsolved problems in [[mathematics]].
==See also==
*[[Brun's constant]]
== References ==
== References ==
*http://numbers.computation.free.fr/Constants/Primes/twin.html
*http://numbers.computation.free.fr/Constants/Primes/twin.html
[[Category:Prime Numbers]]
[[Category:Prime Numbers]]