Yesterday IBM announced that they have a 433 bit quantum computer, called Osprey. There is nothing in the press releases I can find that says whether it can or cannot run Shor's Algorithm.
They also say they are on track to release "Condor", an 1121 bit processor next year.
Shor's algorithm, as far as I know, requires twice the number of bits in the key, so a 256 bit key requires 512 qubits to crack. Hence Osprey cannot do this, but apparently Condor will be able to.
256-bit keys are widely used - for example Ed25519 as used by Bitcoin, and is a valid TLS algorithm.
Is it expected that Osprey will be able to run Shor's algorithm?
If it can, how can the loss of security best be mitigated?