4091

+ The 563rd prime and 5 + 6 + 3 = 4 + 0 + 9 + 1. Note that it is the first prime with this property containing all distinct digits. [Bopardikar]

+ The smallest prime of form n^((n+1)*(n+2))-(n+3), where n > 1. [Vago]

(There is one curio for this number that has not yet been approved by an editor.)

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