5623
This number is a prime.
The first four-digit prime to be found in the decimal expansion of the sqrt(2). [Benney]
The first four decimal digits of 1/(⁴√10) form a prime number. [Leonardis]
(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