RC5 Encryption/Decryption

Hi guys, I'm not totally sure this is the proper thread for this but I figured encryption might fall under software so I thought I might give it a shot.

I play a game called Perplexcity, which has collectible cards, each featuring a mind bending puzzle. One of the unsolved cards hints that it needs to be decrypted using RC5. Right now there are hundreds of computers working together to solve the card but, as of yet, haven't. Looking it over and reading some things I think they might be going about it the wrong way, however, I have no tools to make my own attempts at it. The idea that the company would make people try to decrypt RC5.64 blindly is madness, so I think there is more going on than just that.

So, my question is this. I was looking around trying to find a program used in decrypting this but have come up empty. Can ANYONE point me in the right direction or, if you feel so inclined, upload the proper program to do this? I know it's out there as it's being used this minute, but I just feel like it's being used in the wrong way. Can anyone help?

Oh, and if you're curious as to what I'm talking about, check out this link:
http://perplexcitywiki.com/wiki/The_Thirteenth_Labour

Anyway, bottom line is, I'm looking for a name or program itself for cracking RC5 encryption. Any help would be GREATLY appreciated. Thanks!

Jam it back in, in the dark.

distributed.net has both source for the rc5-64 and rc5-72 clients, so you can use it for your own tool.

Most amazing jew boots

can you point me in the right direction? All I see are source codes for unix machines. Are distributed the only ones that have a program for doing this?

This thing is sticky, and I don't like it. I don't appreciate it.

You didn't read the FAQ, did you?

I am a dolphin, do you want me on your body?

of course not.

I was speaking idiomatically.