The book is now available! 2111
(another Prime Pages' Curiosity)
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+ The square root of 4456321. (The reversal of 4456321 is 1112 squared.)

+ The smallest "prime year" of the 22nd century. The next prime years are 2113, 2129, 2131, 2137, 2141, 2143, 2153, 2161, and 2179.

+ 2111 in base b is prime for all values of b between 2 and 11, with the exception of b=6. [Necula]

+ The first salmonella outbreak associated with peanut butter had product code 2111 on the lid.

+ 2111 = 1 + 2^2 + 2^3 + 2^5 + 2^7 + 2^11. The exponents are consecutive primes. [Noe]

+ The smallest prime that together with its "look-and-say" description from the left in the digit-frequency order (i.e., 2 once, 1 thrice) forms a twin prime pair (2111, 2113) [Beedassy]

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




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