In my opinion the best utility to accomplish CPU-stressing to monitor temperature and fan behavior. In FreeNAS 9.10 you can just do
Code:
wget http://www.mersenne.org/ftp_root/gimps/p95v287.FreeBSD10-64.tar.gz
tar xvfz p95v287.FreeBSD10-64.tar.gz
and start mprime afterwards.
In FreeNAS 9.3(.1) one can use the FreeBSD 8 version
p95v279.FreeBSD64.tar.gz after providing a faked libcurl.so.6 (one has to be root to do that).
Code:
ln -s /usr/local/lib/libcurl.so.7 /usr/local/lib/libcurl.so.6