21
This number is a composite.
Single Curio View: (Seek other curios for this number)
The smallest prime of the form n21 + 21 begins with a decimal expansion of π = 3.141....
Submitted: 2000-06-01 03:25:22; Last Modified: 2008-01-30 17:28:00.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell