4111

This number is a prime.

+ The number of digits in the sixth (and largest known) palindromic prime formed from the reflected decimal expansion of π. It was found by Eric Weisstein in May 2006.

+ The smallest prime p whose smallest positive primitive root (mod p) is not squarefree. [Vantieghem]

+ Euler's number has a nice rational approximation: e ≈ 11175/4111 (two digits out of three are '1's). Note the denominator is a near-repunit prime. [Leonardis]

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

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