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1409 contains no prime digits. (1409) equals 223 and contains all prime
digits. (223) equals 48 with no prime digits. Note that 1409 is the smallest prime with this property. [Punches]
The smallest emirp whose digits are distinct square digits. Note that its reversal is the largest such emirp. [Loungrides] Your best chance of being born in a prime number year in the past millennium was to have been born in the 15th century (17 prime number years, from 1409 to 1499). [Tammet] The first emirp p such that 2p+1, 3p+2, and 4p+3 are prime. [Loungrides]
(There are 5 curios for this number that have not yet been approved by an editor.)
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