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+ The smallest prime whose rearrangement of digits gives the famous Hardy-Ramanujan number (1729). [Gupta]

+ The smallest prime p such that 2^p-1 is also a prime that contains the beast number. [Loungrides]

+ The smallest prime number whose digits can be rearranged to make both a square and a cube (7921 = 89^2, 2197 = 13^3). [Gaydos]

(There are 2 curios for this number that have not yet been approved by an editor.)




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