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Covering the whole solution space would be an enormous (as compared to just huge) undertaking. But if you limit yourself to the types of passwords people usually use, you can prune it down quite a bit.

The currently available databases are surprisingly large, even if not in the scale of 62^8. Consider a random pick from decrypt.fr: "phytostrote972". It's far from a random string, but not exactly a trivial one either.



> Covering the whole solution space would be an enormous (as compared to just huge) undertaking

A HD 5870 can churn through MD5s at about 2.8 billion/sec - 62^8 inside 24 hours on a single unremarkable GPU.




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