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CPU Cycles Needed To Solve RC5 Puzzle

13thlabour.tk — A group of cryptography buffs have established a distributed client program to solve the RC5-encrypted "The Thirteenth Labour" puzzle, one of 256 challenges thrown down as part of the Perplex City game. Their current network of 1500 computers will take around 9 months to solve the puzzle; got any CPU cycles to spare?

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