5701
This number is a prime.
The only 4-digit prime whose the square consists of the
first six digits, 0, 1, 2, 3, 4, 5, i.e., 5701^2=32501401. [Loungrides]
The smallest Honaker prime whose prime index is an emirp. [Bajpai]
The smallest prime that remains prime for D = 1 to 5 in
5D7D0D1. Primes produced are 5171011, 5272021, 5373031,
5474041 and 5575051. [Gupta]
(There is one curio for this number that has not yet been approved by an editor.)
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