1091
This number is a prime.
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The smallest Honaker prime that becomes a Sophie Germain prime when turned upside down. [Jha]
Submitted: 2018-12-15 18:37:05; Last Modified: 2018-12-15 18:50:19.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell