[lemoncucumber]

~10e2/3 is a very unclear what of writing whatever number you're trying to write

[m101]

100-1000 years order of magnitude. I can't remember exactly, but it's well within our ability to engineer and manage, rather than the signs that try to answer the "how do we communicate danger to later species" types of timelines

[chinathrow]

That is a not solved timeframe, at all. We might have a war at a storage facility for years and everything falls apart.