I think you may have in mind a scenario like this:
We've been discussing these things for weeks now, and we haven't heard the tiniest peep out of you. Why are you suddenly objecting?
That pattern using the superlative doesn't adapt very well to an online forum.
Perhaps briefest or most basic or most rudimentary could be used.
The question was up there for five days without even the briefest answer.
The question was up there for five days without even the most basic answer.
The question was up there for five days without even the most rudimentary answer.
The pattern presents the thing as feeble or meager, the least one could possibly do.
The question was up there for five days without even the most slapdash answer.
The question was up there for five days without even the most half-baked answer.