https://tech.newstatesman.com/cloud/google-quantum

Last week a draft research paper that appeared briefly online but was then promptly withdrawn brought news that Google had achieved quantum supremacy, meaning its computers had performed calculations that today’s traditional high-speed computers could not accomplish in a reasonable amount of time.

Purportedly, Google’s Sycamore quantum processor, using 53-qubits, performed calculations in 200 seconds that would have taken today’s supercomputers over 10,000 years to complete.