I'm thining about this for the distant future. As I see it we will be bringing some of these numbers probably far past the 20-million mark andchances are some may go much farther than that needing PRP tests that may take months or even up ot a year. once we get to that point a single factor found every few weeks would still be extremely useful. With this outlook the sieving effort may find it useful ot go much deeper than previously thought