The index of your 20 line file is <20TB number>

Unless, in turn, you locate the index itself in pi at a much smaller index. And so on...

Find k candidate indices for your data, then locate each of them. If the smallest one is a significantly smaller index space, repeat.

	▲	akoboldfrying 3 hours ago \| parent [-]
		Can't tell if you're in on the joke or not, but for anyone who is genuinely wondering whether this might work: Consider that there are at most 256 different indexes that could be represented by a 1-byte index value, but if you're trying to store 9 bits of data, there are already 512 different possible things it could be that each need to be represented by a different index value, otherwise you won't be able to tell them apart. Those pigeons aren't gonna fit.