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A comment on All Mersenne prime exponents below 100m tested at least once. Parent comment

Re:All Mersenne prime exponents below 100m tested at least once by toomuchtodo on Tuesday December 08, 2020 @12:04AM (#25342082)
Really well written comment about the history of these challenges and distributed.net.

“Cracking DES”, a book published by the EFF, contains the necessary information to build your own Deep Crack DES brute force appliance. It’s available in the Internet Archive: https://archive.org/details/crackingdes00elec

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Re:All Mersenne prime exponents below 100m tested at least once by schoen on Friday December 11, 2020 @03:23AM (#25383579)
Although there are several generations of subsequent DES cracking hardware developed by other teams (albeit not with the level of open hardware detail as Deep Crack!).

https://www.copacobana.org/docs.html

https://crack.sh/

(I'm a little confused at why crack.sh had to spend roughly as much money per key per second as Copacobana, when it was being built with a more advanced model of the same manufacturer's FPGAs around a decade later. I wonder if the Virtex-6 has some high-end features that crack.sh doesn't really benefit from, but still had to pay for.)

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