Even Prime

The unique even prime number 2. All other primes are odd primes. Humorously, that means 2 is the "oddest" prime of all.

The sequence 2, 4, 6, 10, 14, 22, 26, 34, 38, ... (OEIS A001747) consisting of the number 2 together with the primes multiplied by 2 is sometimes also called the even primes, since these are the even numbers n=2k that are divisible by just 1, 2, k, and 2k.

See also

Even Number, Odd Prime, Prime Number

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Sloane, N. J. A. Sequence A001747 in "The On-Line Encyclopedia of Integer Sequences."Wells, D. The Penguin Dictionary of Curious and Interesting Numbers. Middlesex, England: Penguin Books, p. 44, 1986.

Referenced on Wolfram|Alpha

Even Prime

Cite this as:

Weisstein, Eric W. "Even Prime." From MathWorld--A Wolfram Web Resource.

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