ParisAlice & Bob estimates 29,588 qubits can break bitcoin keys.

More than 6 million bitcoin sit behind already-exposed public keys.

Shor’s algorithm would derive private keys in 62 minutes, on 17 times fewer qubits than Google estimated in March.

The work is theoretical, and 62 minutes is too slow to steal from unconfirmed transactions with 10-minute blocks.

Alice & Bob expects hardware gains and falling qubit needs to converge in the early 2030s.

How each outlet framed it
CoinDesk
gives the 29,588-qubit estimate and notes it is about 17 times below Google's March figure, flagging the two studies use different hardware designs

Sources: CoinDesk