106891601

This number is a prime.

Just showing those entries submitted by 'Bajpai': (Click here to show all)

+ 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]

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