Working on the assumption that external accounts are given a number, sequentially, based on the date/time they first logged in to LiveJournal, we can see over one hundred seventy-two thousand different external accounts created with OpenID logins.
ext_145000145000
ext_147000147000
ext_150000150000
ext_152000152000
ext_160000160000
ext_163000163000
ext_169000169000
ext_172000172000