not US$ :(, but unknowns: today, in a little less than 30 hours, Puma has solved a problem containing 42,617,376 unknowns.
The target was a 1m cube, illuminated by a dipole at 40.12 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:
32 GBytes RAM
140 GBytes Disk (70 GBytes / machine)
The details of the record will be on the wiki page (as soon as I get it working again!).