1733
This number is a prime.
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(1733, 3371) is the only pair of 4-digit emirps formed by inserting an emirp between the digits of another emirp, i.e., inserting the emirp 73 between the digits of emirp 13 and the emirp 37 between the digits of emirp 31. [Loungrides]
Submitted: 2012-10-17 18:06:13; Last Modified: 2019-04-26 12:43:45.
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