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Difference between revisions of "Twin prime"
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*[http://primes.utm.edu/top20/page.php?id=1 Top 20 known twin primes] | *[http://primes.utm.edu/top20/page.php?id=1 Top 20 known twin primes] | ||
*[[Wikipedia:Twin prime|Twin prime]] | *[[Wikipedia:Twin prime|Twin prime]] | ||
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Revision as of 08:32, 18 July 2019
A twin prime is a prime number that differs from another prime number by two, for example the twin prime pair (41, 43).
It is not known whether there exist infinitely many twin primes. But it is known that the sum of the reciprocals of all twin primes converges to Brun's constant (about 1.902160583104).
Count of twin prime pairs
| Up to | Number of pairs |
|---|---|
| 101 | 2 |
| 102 | 8 |
| 103 | 35 |
| 104 | 205 |
| 105 | 1224 |
| 106 | 8169 |
| 107 | 58980 |
| 108 | 440312 |
| 109 | 3424506 |
| 1010 | 27412679 |
| 1011 | 224376048 |
| 1012 | 1870585220 |
| 1013 | 15834664872 |
| 1014 | 135780321665 |
| 1015 | 1177209242304 |
Reference: Counts of twin prime pairs and Brun's constant to 5e15 by Thomas R. Nicely.
List of twin primes
The next table includes the lower members of the first 500 twin prime pairs. The other members are found by adding 2 to the primes shown below.
Table deleted, have to be created as upload later!
