Oh man - and I moved from Snohomish county last year! I never thought it would happen but my last one was 30 days. I had to check and recheck and recheck.
Before that, they usually lasted 11-16 days. Perhaps they have been modifying the technology to extend the life (there is/was a study for FDA approval of 10-day use I believe).
I'm so glad you posted this - I am curious about how things are going now. When I worked for Dexcom, the longest time that someone reported to me was 20 or 21 days.
For me, I pit all of my sensors against one another so they compete until the very last reading. It would appear that Rich and my sensors would be Olympians in this race. :-)