157
This number is a prime.
Just showing those entries submitted by 'Loungrides': (Click here to show all)
The smallest bisexual emirp, i.e., sharing two pairs of sexy primes: (151, 157) and (157, 163). [Loungrides]
The smallest concave emirp. [Loungrides]
(There is one curio for this number that has not yet been approved by an editor.)
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell