PRObE is accepting applications for use of the large scale clusters (~1000 nodes). The project selection committee will review these applications and process requests for time on the resource. In the mean time, two smaller (128 nodes) staging machines of the same hardware configuration are available for immediate use. PIs can log on to Marmot and Denali to request new projects to be created. Success on the smaller testing clusters are required before applications for time on the large machine will be approved.