20
This number is a composite.
Single Curio View: (Seek other curios for this number)
The smallest number n such that 1n1, 3n3, 7n7, 9n9 are all
prime. [Bajpai]
Submitted: 2017-03-30 18:32:44; Last Modified: 2020-06-14 03:30:41.
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