This parking sign is in Lemont, Illinois.

The parking sign says...

```+-----------------+
| Historic Lemont |
|      1836       |
|   Free Parking  |
|   4 Hour Limit  |
|   9 Am to 6 Pm  |
+-----------------+
```
```   the numbers are:  1836  4  9  6

the math is:  1836 % 4 = 6 % sqrt(9)
more math:  1836 % 9 = 6 % sqrt(4)
more math:  1836 % 6 = 4! % sqrt(9)

note:  4, 6, 9 are all proper divisors of 1836
* 1836 / 4 = 459; 1836 / 6 = 306; 1836 / 9 = 204

...if only we could delete the 1836...
...okay, let's delete the 1836...

the numbers are:  4  9  6

the math is:  6 / sqrt(4) = sqrt(9)

more math:  sqrt(4 * 9) = 6

rsAgeEval:  4 + 9 * 6 = 58
* RoadHacker was 58 years yound when he found this free parking sign.

...okay, let's undelete 1836...

off-by-one math:  gcf(1836, 9, 6) = 4-1

* BARSfunc.spf(n) = the sum of the prime factors of n
domain: n must be a composite number
* 1836 is composite; spf(1836) = 2+2+3+3+3+17 = 30

the numbers morph into:  spf(1836)  4  9  6

the BARSfunc.numbers are: 30  4  9  6
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 24 April 2016 (posted 27 April 2016)