21

This number is a composite.

Single Curio View:   (Seek other curios for this number)
The only Fibonacci number that is the sum of three distinct Fibonacci primes, i.e., 21 = 3 + 5 + 13. [Honaker]

Submitted: 2020-05-28 22:56:47;   Last Modified: 2020-07-25 13:15:26.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell