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The smallest prime that may be written as 2a^{2}  1, and also as 3b^{3}  1. [Hartley]
A man described as looking like a plump Moses asked the following questions during a 1987 joint American Mathematical Society/Mathematical Association of America conference in San Antonio, Texas: "What about 647? Is it prime?" (from The Man Who Loved Only Numbers by Paul Hoffman) 647 equals the sum of all twodigit even semiprimes plus one. [Silva] The largest prime with prime perimeter whose digits form an acuteangle scalene triangle. [Loungrides]
(There are 2 curios for this number that have not yet been approved by an editor.)
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