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Revision as of 03:48, 28 July 2014
Balanced Primes
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Basic Info
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Discovered by | N/A |
Number of | Conjectured infinite |
Description | A prime which is the mean of the previous prime and the following prime |
First Few | 5, 53, 157, 173, 211, 257, 263 |
Balanced Primes are primes which are the mean of the next primes number and the previous prime number. This can be expressed as , where is the nth prime number and and are the previous prime number and the next prime number, respectively. 5 is the first balanced prime, as 3+7/2 =5. It is thought, although not proven, that there are infinitely many balanced primes. In theory, in order to be a balanced prime, the difference between the nth prime number and the n+1th prime number can be any even number, as long as it is the same as the gap between the nth and the n-1th. Most of said even numbers are multiples of three, as a result of the pigeonhole principle. If the difference is not a multiple of three, one of the three numbers n-x, n or n+x will be a multiple of three.