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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