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The smallest prime (emirp) formed from a Pythagorean
quadruple (1223). It is also a lefttruncatable 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 nontitanic 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.)
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