In other words, p is not part of a twin prime pair | Five is therefore the only prime that is part of two twin prime pairs |
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Sometimes the term twin prime is used for a pair of twin primes; an alternative name for this is prime twin or prime pair | Since 2 is the only even prime, this pair is the only pair of prime numbers that differ by one; thus twin primes are as closely spaced as possible for any other two primes |
The Encyclopedia of Integer Sequences.
21The first few isolated primes are , , , , , , , , , , | In other words, a twin prime is a prime that has a of two |
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2001 , , , Kluwer Academic Publishers, ISBN 978-1556080104• There are 808,675,888,577,436 twin prime pairs below 10 18 |
3 as x tends to infinity.
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