How to delete duplicate lines:

File utf-8 292 MB (~26 million lines)
None of the best editors 64-bit did not perform the task. Extremely slow and
non-stop freezing.
I think that in _PowerShell_ was able to, but I need a "tested" code to
remove duplicates

After removing the duplicates should be reduced to around ~300k lines.

Do you have a good idea? :-(
delete duplicate

"-number" or "number"

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