79

This number is a prime.

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The sequence of smallest emirps with exactly n circular loops begins 79, 199, 389, 3089, 3889, 10889, 78889, 186889, 1668889, 3888887, 18988883, 18888809, ... . [Wilson]

Submitted: 2020-01-30 18:20:27; Last Modified: 2020-01-31 12:35:59.