Quote from: AlanJohnson on Today at 12:38:51 PM

Quote from: pbies on Today at 12:33:47 PM

Quote from: AlanJohnson on Today at 12:04:33 PM

Quote from: pbies on Today at 11:38:47 AM

If this is possible with puzzle 66 address, then any address with tx in mempool is possible to be taken. Just the range is a little bigger but still computing the pvk should be the same easy as is for puzzle 66.

Then all BTC is in danger. You may want to try steal any other tx in mempool when there is pubkey available.

No.

Properly generated bitcoin private key is insanely hard to crack (it's 256 bit). Whole bitcoin strength is based on a fact that cracking 256bit is generally considered as impossible.

This can change when quantum machines will be introduced but currently you will not crack it even having PK available.

Yes, it is possible. Just dividing pubkey by some values. Hitting the pvk is matter of even 2 seconds as other fella said here.

Ok ... So why all the puzzles with lower ranges are still sitting there ? Why nobody can crack puzzle 130 ? If that would be possilble all the puzzles would be empty now and every day we would be hearing about stolen bitcoins after making transactions (and releasing public key).

We can divide any public key by any number, but we will never know what range it will be in.
We cannot even divide by 2 with 100 confidence that the division was performed correctly, since the parity of the public key is unknown.