The blockchain has never been hacked.
The value overflow incident is probably the only time someone "hacked" Bitcoin.
Between blocks 74638 and 74691 the largest blockchain contained these fake bitcoins.
No, its never been hacked.
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Someone used the protocol in a way not intended to create a large amount of bitcoins for themselves.
That's the definition of hacking.
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Was more like an exploit of bug. Not a real hacking. But yes, is a very good example, you mentioned.
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