This number is a prime.

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It is possible to measure all of the integer distances from one to six on a six-inch ruler with just 2 marks. For example, the distance from the 2 to the right end is four inches. [Caldwell]

Submitted: 2008-03-20 23:19:37;   Last Modified: 2008-12-23 02:28:49.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell