4909
This number is a prime.
4909 is a pernicious prime because it contains a prime number of ones in its binary representation.
The Gregorian calendar is just a tad out of sync with
Earth’s trip ’round the sun. The difference isn’t huge —
we’ll have an extra day to deal with by 4909 CE. [Plumer]
(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