2463
This number is a composite.
The 2463th prime number appears in the Collatz trajectory for 2463. The sequence of these numbers is 3, 7, 27, 54, 108, 2463, ... . Can you find the next number with this property? [Sariyar]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell