This road sign is on westbound CA Hwy-98 in California.

The road sign says...

+-----------------+ | Calexico 17 | | Jct 8 49 | | San Diego 134 | +-----------------+MathBabbler has not been able to find any math in this road sign; therefore, he used the

spf(n)function to morph non-prime numbers into prime numbers.spf(n)equals the sum of the prime factors forn.the numbers are: 17 8 49 134 the math is: A = spf(spf(spf(spf(spf(spf(spf(134))))))) = 5 B = spf(spf(8)) = 5 A + B + sqrt(49) = 17 5 + 5 + 7 = 17 observe... spf(134) = 69 [2 + 67] spf(69) = 26 [3 + 23] spf(26) = 15 [3 + 13] spf(15) = 8 [3 + 5] spf(8) = 6 [2 + 2 + 2] spf(6) = 5 [2 + 3]

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

**Created:** 18 December 2007

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