3779
This number is a prime.
3779 divides nine previous consecutive concatenated composite numbers, i.e., 3770 3771 3772 3773 3774 3775 3776 3777 3778. Note that 3779 is also a circular prime. [De Geest]
(3779, 7937) is the only pair of primes formed from the
concatenation of two double-digit emirps as pq and qp,
where p=37 and q=79. [Loungrides]
(There is one curio for this number that has not yet been approved by an editor.)
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