This number is a prime.

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The smallest Honaker emirp P containing all of the invertible digits {0, 1, 6, 8, 9}, that yields another Honaker emirp Q (109168901) when rotated by 180 degrees. Curiously, P and Q both are expressible as the sum of two squares. [Bajpai]

Submitted: 2021-02-03 06:59:02;   Last Modified: 2021-02-03 07:09:58.
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