10101869

This number is a prime.

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The smallest Honaker prime P, containing all of the strobogrammatic digits {0, 1, 6, 8, 9}, yields another Honaker prime Q when rotated by 180 degrees. Curiously, P and Q both are expressible as the sum of two squares. [Bajpai]

Submitted: 2019-06-04 21:19:24;   Last Modified: 2019-06-05 06:56:55.
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