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Twin primes are pairs of primes separated by only 2.

The smallest twin primes are (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43).

All twin primes except (3, 5) are of the form 6n+/-1.<ref>http://mathworld.wolfram.com/TwinPrimes.html</ref>

== References ==

<references/>

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