Jasong,
You should always submit all of the factors you find through the server first, as you find them (once a day once every three days etc...)
http://www.seventeenorbust.com/sieve
Then once your entire range is finished you zip the three files, fact.txt, factrange.txt, and factexcl.txt into one zip. Title the zip
Start-Stop_username_991-50M.zip
Example:
801000-802000_JasonG_991-50M.zip
Since we are only testing at n~9.1M currently and n=1.9M for secondpass. The only factors that we need imedately are the once that are very close I.e. will be tested within a week.
Anything between those values is important right now. Anything above or below is less so.
Since the server automatically credits and arhives those n<20M. Your doing good, Since those above n>20M are not currently needed. There is no pressing concern to e-mail them right away. It's actually better to wait until you have a large range finished, i.e. 1000G worth.
Hope this helps.