largest system available



Hi, CCLer
 I am interesting in find out what is the largest system studied
 using DFT method until now.  In another words, assuming one has
 enomous of CPU power to himself (eg. 512 cpu, 512GB memory, no
 limit cpu time), what is the largest system has been optimized?
 Either using commercial software, such as Gaussian or ADF, or
 freeware, such as MWchem and GAMESS.  Any comments will be
 appreciated!
 Have a nice day!
 huajun