It should be mentioned that IBM managed to simulate a 56 qubit version of the same problem Google describes in the paper (see https://pastebin.com/RfUMXJZE http

It should be mentioned that IBM managed to simulate a 56 qubit version of the same problem Google describes in the paper (see https://pastebin.com/RfUMXJZE https://pastebin.com/RfUMXJZE) on a classical super computer: - https://www.ibm.com/blogs/research/2017/10/quantum-computing-barrier/ https://www.ibm.com/blogs/research/2017/10/quantum-computing... - https://www.newscientist.com/article/2151032-googles-quantum-computing-plans-threatened-by-ibm-curveball/ https://www.newscientist.com/article/2151032-googles-quantum... So technically Google cannot claim to reach quantum supremancy with only 54 qubits as described in the paper.