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The smallest square prime. (A square prime is a prime of n^{2} digits (n > 1) arranged leftright, topdown in a nbyn matrix, where the rows and columns are also prime in each direction.) [Croll]
The smallest 4digit prime comprised of two twodigit primes. [Sladcik] "One Thousand One Hundred Seventeen" is the smallest number whose English name is spelled with exactly thirty letters. It happens to be a prime. [Post] The concatenated prime factors of (1117). [Lewis] The famous Japanese mathematician Yutaka Taniyama (19271958) committed suicide on November the seventeenth (11/17). The smallest of only two square primes of order 2 that are also diagonal primes. The other is 1171. [Loungrides] The smallest prime formed by concatenating the smaller members of two successive twin prime pairs: {(11, 13) ; (17, 19)}. Note that the reverse concatenation of the larger members forms an emirp (1913), and that similar properties hold for the two successive twin prime pairs {(101, 103) ; (107, 109)} : 101107 is prime while 109103 is an emirp. [Beedassy] The smallest 4digit unholey prime. The smallest odddigit centerdeletable prime. [Loungrides]
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