Today, in a little less than 60 hours, Puma has solved a problem containing 53,913,204 unknowns.
The target was a 1m cube, illuminated by a dipole at 45.12 GHz.
It happened on two 64-bits quad core machines (Intel(R) Xeon(R) CPU E5430 @ 2.66GHz, 6MB cache, 5333.58 bogomips) with 16 GBytes of RAM each.
The memory occupation of Puma was:
37 GBytes RAM
180 GBytes Disk (90 GBytes / machine)
The details of the record are on the wiki.