191

This number is a prime.

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191 is the smallest prime that is a semiprime when turned upside down. [Honaker]

Submitted: 2022-01-23 04:00:33;   Last Modified: 2022-02-08 18:38:15.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell