The book is now available! 307
(another Prime Pages' Curiosity)
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+ The square of 307 is palindromic.

+ El Salvador has 307 kilometers of coastline.

+ 307 has period length 13 + 53 + 33.

+ The Area Code for Wyoming is 307.

+ The smallest number that is the sum of any set of primes containing all digits: 2 + 5 + 41 + 67 + 83 + 109 = 307. [Gallardo]

+ In the movie The Odd Couple, when Felix checks into a hotel, the first room the desk clerk tries to assign him is 307. [Litman]

+ The largest number that you can type in Excel is 9.999 * 10307. If you type in a larger number, Excel will treat it as a character string. [Andrew]

+ From 1967 to 1972, The Grass Roots set a record for being on the Billboard charts 307 straight weeks.

+ Curious Book Shop is a used and rare book store located in downtown East Lansing, Michigan (307 East Grand River Avenue).

+ Smallest of the first case of seven consecutive primes that remain prime if you eliminate their first digit. [Loungrides]

+ The smallest and only known non-palindromic prime whose square is a palindrome number, i.e., 94249. [Loungrides]

+ The smallest prime whose reversal is a Kaprekar number. [Loungrides]

(There are 6 curios for this number that have not yet been approved by an editor.)

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