The book is now available! 1237
(another Prime Pages' Curiosity)
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+ The difference between 12372 and (1237 - 5)2 might surprise you.

+ An emirp formed from the number 12 and the 12th prime. Its reversal, 7321, is formed from the 21th prime and number 21. [Silva]

+ The smallest four-digit emirp with distinct digits. Note that the sum of its digits is equal to the smallest double-digit emirp. [Loungrides]

+ The first primeval emirp whose sum of digits is also an emirp. Note that the number of primes contained is twice its emirp sum of digits. [Beedassy]

+ The smallest "self-ranking prime" (primes which are a concatenation of n and prime[n]) that is also an emirp. [Green]

+ The number of delegates needed to become the presidential nominee for the Republican Party of the United States of America. It is exactly half the number of total delegates, plus one.




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