The book is now available! 1223
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

+ The smallest prime (emirp) formed from a Pythagorean quadruple (1-2-2-3). It is also a left-truncatable prime. [Loungrides]

+ The smallest prime concatenating the sequence of the number of divisors of n, in this case for n = 1, 2, 3, 4. [Post]

+ In the penultimate Bible verse (Revelation 22:20), Lord Jesus has an isopsephia value of 1223, the 200th prime number. [Slattery]

+ The smallest prime (emirp) obtained by concatenating an integer with the product and sum of its own digits. [Loungrides]

+ The larger of only two non-titanic primes p, that is the product of a repunit number and all truncations of itself plus two, i.e., 111*11*1+2. Note that the other such prime, 11*1+2, is also emirp. [Loungrides]

(There are 8 curios for this number that have not yet been approved by an editor.)

Prime Curios! © 2000-2018 (all rights reserved)  privacy statement