# 1117

This number is a prime.

The smallest square prime. (A square prime is a prime of *n*^{2} digits (*n* > 1) arranged left-right, top-down in a *n*-by-*n* matrix, where the rows and columns are also prime in each direction.) [Croll]

The smallest 4-digit prime comprised of two two-digit 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 π(1117). [Capelle]

The famous Japanese mathematician Yutaka Taniyama (1927-1958) 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 4-digit unholey prime.

The smallest odd-digit center-deletable prime. [Loungrides]

1117 is the 187th prime p. Note that 187, is brilliant with prime factors 11 and 17. This is the first case of a prime p that can be written by concatenating the prime factors of its order. [Loungrides]