This number is a prime.
Single Curio View: (Seek other curios for this number)23 is the smallest and only prime of the form 2x^2 - y^2 and 3x^2 - y^2, where x and y are two consecutive numbers. [Teofilatto]
Submitted: 2004-10-19 16:23:35; Last Modified: 2008-01-30 11:28:00.
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