| Twin Primes
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|---|---|
Basic Info
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| Discovered by | Paul Stäckel (August 20, 1862-December 12, 1919) |
| 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[]
3,756,801,695,685 · 2^666669 ± 1.
See also[]
- Cousin Primes, wherein the gap is four.
- Sexy Primes, wherein the gap is six.