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Twin Primes
Basic Info
Discovered by
Number of
Description p and p+2 are both primes.
First Few (3, 5), (5, 7),
(11, 13), (17, 19)

Twin primes are numbers wherein two numbers have a gap of two. According to Wikipedia, there are 808,675,888,577,436 twin prime pairs below 10^18, or 1 quintillion.

Examples

3 and 5 are twin primes

5 and 7 are twin primes

11 and 13 are twin primes, et al.

Largest known twin prime

3756801695685 · 2^666669 ± 1.

See also

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