This road sign was found on a road to Boring, Oregon.

To date, no math has been discovered using the

`number 212`

found in the highway sign. We have math if the West OR Hwy-212 highway sign is removed.original: +------------------+ | Boring 2 | | Oregon City 16 | +------------------+ +--------+ | West | | OR 212 | +--------+ West OR 212 highway sign removed... +------------------+ | Boring 2 | | Oregon City 16 | +------------------+the numbers are: 2 16 the math is: sqrt(sqrt(16)) = 2 observe... sqrt(16) = 4 sqrt(4) = 2Across the road from the Boring sign was a road sign indicating we were 39 miles from Mt. Hood.

## Update::2006.08.29

It was suggested during class that if

`212`

was split into three different numbers, there was math.the numbers are: 2 1 2 2 16 that math is: 1 * 2^(2 + 2) = 16 more math: no or yes: 1 * 2^(2 * 2) = 16 no or yes: 1 * 2^(2^2) = 16 no or yes: 1 * (2 + 2)^2 = 16 no or yes: (2 * 2)^2 = 16^1## Update::2008.01.24

MathBabbler created the

spf(n)function during late-November of 2007. Thespf(n)function outputs the sum of the prime factors of its inputn.spf(n) = nwhennis prime.This BAB was revisited using the 212 highway sign and the

spf(n)function.the numbers are: 2 16 212 the math is: spf(spf(212)) + 2 = sqrt(16)! observe... spf(212) = 57 spf(57) = 22 22 + 2 = 24 sqrt(16) = 4 4! = 24 [factorial(4) = 4 * 3 * 2 * 1]

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

**Created:** 02 August 2006

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