This road sign is west of US Hwy-95 in southwest Arizona.

The road sign says...

+-------------+ | Access To: | | La Posa DZ | | Tyson DZ | | Abkin DZ | | Mohave DZ | | Corral DZ | | Site 16 | | Site 18 | | Corral Road | --------------- | Cibola Mud | | 3.2 Miles | +-------------+the numbers are: 3.2 16 18 the math is: 16 / 3.2 = spf(spf(spf(18))) observe... spf(n) = sum of the prime factors of 'n' spf(18) = 8 [2 + 3 + 3] spf( 8) = 6 [2 + 2 + 2] spf( 6) = 5 [2 + 3] if . is a delimiter, then the numbers are: 16 18 3 2 the math is: sqrt(sqrt(16)) * 3^2 = 18 observe... sqrt(16) = 4 sqrt( 4) = 2 3^2 = 3 * 3 = 9 2 * 9 = 18 [solve for 'n'] sqrt(sqrt(16)) = 18 / n

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 18 December 2007

This work is licensed under a Creative Commons Attribution 3.0 United States License.