[r-t] Big searches

[Mark Davies]

Time for a "mine's bigger than yours" competition. Who has run the biggest
machine search, measured by number of nodes searched?

I'll start - I've got a search on the go at the moment which has just tipped
over the 100 trillion node mark. It's been running for 432 hours so far,
with an average of just less than 100,000 compositions found and checked per
second, every second. By the time it's finished it should have searched 300 
trillion nodes.

Anyone got anything bigger? I've run longer searches in the past, but on
older hardware, so I think this is a node highwatermark for me.

MBD