Pls advice free proxy checker software

Please advice free proxy checker software, i got 450Mb big list with 23 million possible proxies, one per line, format:

iport

i tried my paid scrapebox, but it crashes.

software should have:
multithreading (so i dont do it untill my dead)
ability to pause check (or linux sw)

thx

Odds are that list is useless, you're better off forgetting about it and just finding some reliable sources or purchasing private ones from people here.

^ What he said. If you REALLY want to test it, then split the file into 10MB chunks and test it then. But either way, it would be a waste of time and resources as no public proxy lives for a very long time.