47

This number is a prime.

Single Curio View:   (Seek other curios for this number)
There is conjectured to be only 47 positive integers which are not twice a square number and cannot be written as (twice a nonzero square number) + (odd prime or twice an odd prime). [Xayah]

Submitted: 2022-02-05 17:01:52;   Last Modified: 2022-02-05 17:04:03.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell