Keyless Entry...

[VNMUS]

So, you know those cars with that keyless entry pad? The one under the driver's side handle? Well, if you look closely you will see that there are really only 5 buttons, labeled "1/2", "3/4", "5/6", "7/8", "9/0". In an effort to avoid a little confusion, I'm going to call those buttons 1, 3, 5, 7, and 9, respectively.
A little experimentation will reveal that, if the code is 11357, and you type 5113579, the door will still open! This means that with 7 characters we managed to try out 3 sequences - 51135, 11357, and 13579. After the inital 4 numbers (which sort of primed the pump) every digit tries one new sequence. Since there are 5<SUP><SMALL>5</SMALL></SUP> length 5 sequences of characters from an alphabet of size 5, we know that we'll need to try 3125 sequences total. With our intuition from above, we would hope that we could find a sequence of size 4 + 3125 (priming the pump, followed by one new sequence every keypress). It turns out that a mathematician named de Bruijn has already done all of the hard work for us on this one, and all of the relevant math can found under the names de Bruijn sequence and de Bruijn graph. But I'm not going to talk about math any further here. Right now, I am going to give you a sequence of minimal length that, when you enter it into a car's numeric keypad, is guaranteed to unlock the doors of said car. It is exactly 3129 keypresses long, which should take you around 20 minutes to go through.
<CODE><SMALL>9 9 9 9 1 1 1 1 1 3 1 1 1 1 5 1 1 1 1 7 1 1 1 1 9 1 1 1 3 3 1 1 1 3 5 1 1 1 3 7 1 1 1 3 9 1 1 1 5 3 1 1 1 5 5 1 1 1 5 7 1 1 1 5 9 1 1 1 7 3 1 1 1 7 5 1 1 1 7 7 1 1 1 7 9 1 1 1 9 3 1 1 1 9 5 1 1 1 9 7 1 1 1 9 9 1 1 3 1 3 1 1 3 1 5 1 1 3 1 7 1 1 3 1 9 1 1 3 3 3 1 1 3 3 5 1 1 3 3 7 1 1 3 3 9 1 1 3 5 3 1 1 3 5 5 1 1 3 5 7 1 1 3 5 9 1 1 3 7 3 1 1 3 7 5 1 1 3 7 7 1 1 3 7 9 1 1 3 9 3 1 1 3 9 5 1 1 3 9 7 1 1 3 9 9 1 1 5 1 3 1 1 5 1 5 1 1 5 1 7 1 1 5 1 9 1 1 5 3 3 1 1 5 3 5 1 1 5 3 7 1 1 5 3 9 1 1 5 5 3 1 1 5 5 5 1 1 5 5 7 1 1 5 5 9 1 1 5 7 3 1 1 5 7 5 1 1 5 7 7 1 1 5 7 9 1 1 5 9 3 1 1 5 9 5 1 1 5 9 7 1 1 5 9 9 1 1 7 1 3 1 1 7 1 5 1 1 7 1 7 1 1 7 1 9 1 1 7 3 3 1 1 7 3 5 1 1 7 3 7 1 1 7 3 9 1 1 7 5 3 1 1 7 5 5 1 1 7 5 7 1 1 7 5 9 1 1 7 7 3 1 1 7 7 5 1 1 7 7 7 1 1 7 7 9 1 1 7 9 3 1 1 7 9 5 1 1 7 9 7 1 1 7 9 9 1 1 9 1 3 1 1 9 1 5 1 1 9 1 7 1 1 9 1 9 1 1 9 3 3 1 1 9 3 5 1 1 9 3 7 1 1 9 3 9 1 1 9 5 3 1 1 9 5 5 1 1 9 5 7 1 1 9 5 9 1 1 9 7 3 1 1 9 7 5 1 1 9 7 7 1 1 9 7 9 1 1 9 9 3 1 1 9 9 5 1 1 9 9 7 1 1 9 9 9 1 3 1 3 3 1 3 1 3 5 1 3 1 3 7 1 3 1 3 9 1 3 1 5 3 1 3 1 5 5 1 3 1 5 7 1 3 1 5 9 1 3 1 7 3 1 3 1 7 5 1 3 1 7 7 1 3 1 7 9 1 3 1 9 3 1 3 1 9 5 1 3 1 9 7 1 3 1 9 9 1 3 3 1 5 1 3 3 1 7 1 3 3 1 9 1 3 3 3 3 1 3 3 3 5 1 3 3 3 7 1 3 3 3 9 1 3 3 5 3 1 3 3 5 5 1 3 3 5 7 1 3 3 5 9 1 3 3 7 3 1 3 3 7 5 1 3 3 7 7 1 3 3 7 9 1 3 3 9 3 1 3 3 9 5 1 3 3 9 7 1 3 3 9 9 1 3 5 1 5 1 3 5 1 7 1 3 5 1 9 1 3 5 3 3 1 3 5 3 5 1 3 5 3 7 1 3 5 3 9 1 3 5 5 3 1 3 5 5 5 1 3 5 5 7 1 3 5 5 9 1 3 5 7 3 1 3 5 7 5 1 3 5 7 7 1 3 5 7 9 1 3 5 9 3 1 3 5 9 5 1 3 5 9 7 1 3 5 9 9 1 3 7 1 5 1 3 7 1 7 1 3 7 1 9 1 3 7 3 3 1 3 7 3 5 1 3 7 3 7 1 3 7 3 9 1 3 7 5 3 1 3 7 5 5 1 3 7 5 7 1 3 7 5 9 1 3 7 7 3 1 3 7 7 5 1 3 7 7 7 1 3 7 7 9 1 3 7 9 3 1 3 7 9 5 1 3 7 9 7 1 3 7 9 9 1 3 9 1 5 1 3 9 1 7 1 3 9 1 9 1 3 9 3 3 1 3 9 3 5 1 3 9 3 7 1 3 9 3 9 1 3 9 5 3 1 3 9 5 5 1 3 9 5 7 1 3 9 5 9 1 3 9 7 3 1 3 9 7 5 1 3 9 7 7 1 3 9 7 9 1 3 9 9 3 1 3 9 9 5 1 3 9 9 7 1 3 9 9 9 1 5 1 5 3 1 5 1 5 5 1 5 1 5 7 1 5 1 5 9 1 5 1 7 3 1 5 1 7 5 1 5 1 7 7 1 5 1 7 9 1 5 1 9 3 1 5 1 9 5 1 5 1 9 7 1 5 1 9 9 1 5 3 1 7 1 5 3 1 9 1 5 3 3 3 1 5 3 3 5 1 5 3 3 7 1 5 3 3 9 1 5 3 5 3 1 5 3 5 5 1 5 3 5 7 1 5 3 5 9 1 5 3 7 3 1 5 3 7 5 1 5 3 7 7 1 5 3 7 9 1 5 3 9 3 1 5 3 9 5 1 5 3 9 7 1 5 3 9 9 1 5 5 1 7 1 5 5 1 9 1 5 5 3 3 1 5 5 3 5 1 5 5 3 7 1 5 5 3 9 1 5 5 5 3 1 5 5 5 5 1 5 5 5 7 1 5 5 5 9 1 5 5 7 3 1 5 5 7 5 1 5 5 7 7 1 5 5 7 9 1 5 5 9 3 1 5 5 9 5 1 5 5 9 7 1 5 5 9 9 1 5 7 1 7 1 5 7 1 9 1 5 7 3 3 1 5 7 3 5 1 5 7 3 7 1 5 7 3 9 1 5 7 5 3 1 5 7 5 5 1 5 7 5 7 1 5 7 5 9 1 5 7 7 3 1 5 7 7 5 1 5 7 7 7 1 5 7 7 9 1 5 7 9 3 1 5 7 9 5 1 5 7 9 7 1 5 7 9 9 1 5 9 1 7 1 5 9 1 9 1 5 9 3 3 1 5 9 3 5 1 5 9 3 7 1 5 9 3 9 1 5 9 5 3 1 5 9 5 5 1 5 9 5 7 1 5 9 5 9 1 5 9 7 3 1 5 9 7 5 1 5 9 7 7 1 5 9 7 9 1 5 9 9 3 1 5 9 9 5 1 5 9 9 7 1 5 9 9 9 1 7 1 7 3 1 7 1 7 5 1 7 1 7 7 1 7 1 7 9 1 7 1 9 3 1 7 1 9 5 1 7 1 9 7 1 7 1 9 9 1 7 3 1 9 1 7 3 3 3 1 7 3 3 5 1 7 3 3 7 1 7 3 3 9 1 7 3 5 3 1 7 3 5 5 1 7 3 5 7 1 7 3 5 9 1 7 3 7 3 1 7 3 7 5 1 7 3 7 7 1 7 3 7 9 1 7 3 9 3 1 7 3 9 5 1 7 3 9 7 1 7 3 9 9 1 7 5 1 9 1 7 5 3 3 1 7 5 3 5 1 7 5 3 7 1 7 5 3 9 1 7 5 5 3 1 7 5 5 5 1 7 5 5 7 1 7 5 5 9 1 7 5 7 3 1 7 5 7 5 1 7 5 7 7 1 7 5 7 9 1 7 5 9 3 1 7 5 9 5 1 7 5 9 7 1 7 5 9 9 1 7 7 1 9 1 7 7 3 3 1 7 7 3 5 1 7 7 3 7 1 7 7 3 9 1 7 7 5 3 1 7 7 5 5 1 7 7 5 7 1 7 7 5 9 1 7 7 7 3 1 7 7 7 5 1 7 7 7 7 1 7 7 7 9 1 7 7 9 3 1 7 7 9 5 1 7 7 9 7 1 7 7 9 9 1 7 9 1 9 1 7 9 3 3 1 7 9 3 5 1 7 9 3 7 1 7 9 3 9 1 7 9 5 3 1 7 9 5 5 1 7 9 5 7 1 7 9 5 9 1 7 9 7 3 1 7 9 7 5 1 7 9 7 7 1 7 9 7 9 1 7 9 9 3 1 7 9 9 5 1 7 9 9 7 1 7 9 9 9 1 9 1 9 3 1 9 1 9 5 1 9 1 9 7 1 9 1 9 9 1 9 3 3 3 1 9 3 3 5 1 9 3 3 7 1 9 3 3 9 1 9 3 5 3 1 9 3 5 5 1 9 3 5 7 1 9 3 5 9 1 9 3 7 3 1 9 3 7 5 1 9 3 7 7 1 9 3 7 9 1 9 3 9 3 1 9 3 9 5 1 9 3 9 7 1 9 3 9 9 1 9 5 3 3 1 9 5 3 5 1 9 5 3 7 1 9 5 3 9 1 9 5 5 3 1 9 5 5 5 1 9 5 5 7 1 9 5 5 9 1 9 5 7 3 1 9 5 7 5 1 9 5 7 7 1 9 5 7 9 1 9 5 9 3 1 9 5 9 5 1 9 5 9 7 1 9 5 9 9 1 9 7 3 3 1 9 7 3 5 1 9 7 3 7 1 9 7 3 9 1 9 7 5 3 1 9 7 5 5 1 9 7 5 7 1 9 7 5 9 1 9 7 7 3 1 9 7 7 5 1 9 7 7 7 1 9 7 7 9 1 9 7 9 3 1 9 7 9 5 1 9 7 9 7 1 9 7 9 9 1 9 9 3 3 1 9 9 3 5 1 9 9 3 7 1 9 9 3 9 1 9 9 5 3 1 9 9 5 5 1 9 9 5 7 1 9 9 5 9 1 9 9 7 3 1 9 9 7 5 1 9 9 7 7 1 9 9 7 9 1 9 9 9 3 1 9 9 9 5 1 9 9 9 7 1 9 9 9 9 3 3 3 3 3 5 3 3 3 3 7 3 3 3 3 9 3 3 3 5 5 3 3 3 5 7 3 3 3 5 9 3 3 3 7 5 3 3 3 7 7 3 3 3 7 9 3 3 3 9 5 3 3 3 9 7 3 3 3 9 9 3 3 5 3 5 3 3 5 3 7 3 3 5 3 9 3 3 5 5 5 3 3 5 5 7 3 3 5 5 9 3 3 5 7 5 3 3 5 7 7 3 3 5 7 9 3 3 5 9 5 3 3 5 9 7 3 3 5 9 9 3 3 7 3 5 3 3 7 3 7 3 3 7 3 9 3 3 7 5 5 3 3 7 5 7 3 3 7 5 9 3 3 7 7 5 3 3 7 7 7 3 3 7 7 9 3 3 7 9 5 3 3 7 9 7 3 3 7 9 9 3 3 9 3 5 3 3 9 3 7 3 3 9 3 9 3 3 9 5 5 3 3 9 5 7 3 3 9 5 9 3 3 9 7 5 3 3 9 7 7 3 3 9 7 9 3 3 9 9 5 3 3 9 9 7 3 3 9 9 9 3 5 3 5 5 3 5 3 5 7 3 5 3 5 9 3 5 3 7 5 3 5 3 7 7 3 5 3 7 9 3 5 3 9 5 3 5 3 9 7 3 5 3 9 9 3 5 5 3 7 3 5 5 3 9 3 5 5 5 5 3 5 5 5 7 3 5 5 5 9 3 5 5 7 5 3 5 5 7 7 3 5 5 7 9 3 5 5 9 5 3 5 5 9 7 3 5 5 9 9 3 5 7 3 7 3 5 7 3 9 3 5 7 5 5 3 5 7 5 7 3 5 7 5 9 3 5 7 7 5 3 5 7 7 7 3 5 7 7 9 3 5 7 9 5 3 5 7 9 7 3 5 7 9 9 3 5 9 3 7 3 5 9 3 9 3 5 9 5 5 3 5 9 5 7 3 5 9 5 9 3 5 9 7 5 3 5 9 7 7 3 5 9 7 9 3 5 9 9 5 3 5 9 9 7 3 5 9 9 9 3 7 3 7 5 3 7 3 7 7 3 7 3 7 9 3 7 3 9 5 3 7 3 9 7 3 7 3 9 9 3 7 5 3 9 3 7 5 5 5 3 7 5 5 7 3 7 5 5 9 3 7 5 7 5 3 7 5 7 7 3 7 5 7 9 3 7 5 9 5 3 7 5 9 7 3 7 5 9 9 3 7 7 3 9 3 7 7 5 5 3 7 7 5 7 3 7 7 5 9 3 7 7 7 5 3 7 7 7 7 3 7 7 7 9 3 7 7 9 5 3 7 7 9 7 3 7 7 9 9 3 7 9 3 9 3 7 9 5 5 3 7 9 5 7 3 7 9 5 9 3 7 9 7 5 3 7 9 7 7 3 7 9 7 9 3 7 9 9 5 3 7 9 9 7 3 7 9 9 9 3 9 3 9 5 3 9 3 9 7 3 9 3 9 9 3 9 5 5 5 3 9 5 5 7 3 9 5 5 9 3 9 5 7 5 3 9 5 7 7 3 9 5 7 9 3 9 5 9 5 3 9 5 9 7 3 9 5 9 9 3 9 7 5 5 3 9 7 5 7 3 9 7 5 9 3 9 7 7 5 3 9 7 7 7 3 9 7 7 9 3 9 7 9 5 3 9 7 9 7 3 9 7 9 9 3 9 9 5 5 3 9 9 5 7 3 9 9 5 9 3 9 9 7 5 3 9 9 7 7 3 9 9 7 9 3 9 9 9 5 3 9 9 9 7 3 9 9 9 9 5 5 5 5 5 7 5 5 5 5 9 5 5 5 7 7 5 5 5 7 9 5 5 5 9 7 5 5 5 9 9 5 5 7 5 7 5 5 7 5 9 5 5 7 7 7 5 5 7 7 9 5 5 7 9 7 5 5 7 9 9 5 5 9 5 7 5 5 9 5 9 5 5 9 7 7 5 5 9 7 9 5 5 9 9 7 5 5 9 9 9 5 7 5 7 7 5 7 5 7 9 5 7 5 9 7 5 7 5 9 9 5 7 7 5 9 5 7 7 7 7 5 7 7 7 9 5 7 7 9 7 5 7 7 9 9 5 7 9 5 9 5 7 9 7 7 5 7 9 7 9 5 7 9 9 7 5 7 9 9 9 5 9 5 9 7 5 9 5 9 9 5 9 7 7 7 5 9 7 7 9 5 9 7 9 7 5 9 7 9 9 5 9 9 7 7 5 9 9 7 9 5 9 9 9 7 5 9 9 9 9 7 7 7 7 7 9 7 7 7 9 9 7 7 9 7 9 7 7 9 9 9 7 9 7 9 9 7 9 9 9 9 9 </SMALL></CODE>

Happy hacking!
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[AstroVic]

My luck, I would get about 19 minutes into it and mis-punch one of the numbers.

[whoskal]

You have way too much time on your hands

[TAF]

I liked the sick lizard story MUCH better....

[VNMUS]

I liked the sick lizard story MUCH better....

LMAO!

[Bradley G]

You' re Good with your hands!

[Agent M79]

I built a quick spreadsheet to allow you to input your code to find out the position your code begins in.

If you are a little less lazy, you can copy and paste the digits, remove the spaces, translate your keys to the odd number as described in the thread starter and do a search for your digit string.

It works. You will find yours. If you don't, there is a chair-keyboard interface issue.

The real question now is what is the minimum key press time and what is the minimum inter-digit pause time. With that, we are on our way to something we should not be posting openly.

I'll be in the lab.

[SergntMac]

Hold on a sec, lemme find a crayon...Okay, ready...Repeat that sequence, please?

[fastblackmerc]

And why do we need to know this?

[jabo731]

A true thief is not going to stand at your car for 20 mins. pressing buttons, he going to break your rear door small window(which ever is convienant ex.sidewalk side, less visible) Open door snatch cyclinder and drive away still 15 minutes ahead of the key puncher.

[Agent M79]

And why do we need to know this?

I intend to memorize the 3,129 digits just in case I forget my 5 digit code...

A true thief is not going to stand at your car for 20 mins. pressing buttons, he going to break your rear door small window(which ever is convienant ex.sidewalk side, less visible) Open door snatch cyclinder and drive away still 15 minutes ahead of the key puncher.

But when I issue my order to 'harvest all Marauders' to my flunkies and minions, I am not going to want to replace a bunch of glass. Once we get this code thing all worked out, we are moving on to PATS. And then, my friends, I will have a different Marauder to drive every day for the next 11,000 days.

[rocknrod]

You wanna impress somebody? What LOTO numbers should I play in Texas right now?

[Paul T. Casey]

Easier method, find out the owners birthday, wife's birthday and kids birthday. Better than a 50 % chance one of those is the combo. Just human nature.

[ap2003]

I guess we could call this "Marauder Pi"
Gus

[SergntMac]

Easier method, find out the owners birthday, wife's birthday and kids birthday. Better than a 50 % chance one of those is the combo. Just human nature.

You would be surprised by how many use their license plate numbers (sometimes in reverse) as the code. Folks today have very lazy memories. Just when someone thinks they are out-smarting the rest of the crowd, someone else steps up and shows them how far down the food chain they really are. This too, is human nature...