71

This number is a prime.

Single Curio View:   (Seek other curios for this number)
In 1935, Erdős and Szekeres proved that 71 points (no three on a single line) are required to guarantee there are six that form a convex hexagon, although 17 points are thought to be sufficient. (In 1998, the upper bound was reduced to 37.)

Submitted: 2004-06-19 19:38:27;   Last Modified: 2009-04-16 22:20:29.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell