The Most Long Lastingest Storage?

What digital storage can retain information the longest? Recordable CD/DVDs only last a couple of years. A decade at most. Barring catastrophic disk failures, HDs seem to last the longest, but what about Flash Memory? These types of memories are increasing in capacity rapidly and they don't have any moving parts.

>>6
I would like to know where you are pulling that information from. I'm not talking about princo, crap brands. A decade would be stretching it. Granted I still have Memorex CDRs from 4 years ago that still read. I suppose if you burned a TY DVD and kept it in a dry, dark place and never used it, it could last longer, but 100 years?!? I call bullshit.