21347
This number is a prime.
Single Curio View: (Seek other curios for this number)
The first five Lucas numbers concatenated form a prime. [Axoy]
Submitted: 2004-07-28 11:20:50; Last Modified: 2008-01-30 17:28:00.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell