D-Wave Quantum Inc. said today a peer-reviewed scientific paper proves it has finally passed a critical threshold and achieved “quantum supremacy” — that is, the point at which its quantum computers have finally solved a problem that’s impossible for even the most powerful “classical” computers to do.

Quantum computing firm D-Wave claims it has demonstrated quantum supremacy on a “useful, real-world problem.” The company said the achievement was made using D-Wave’s Advantage2 prototype annealing quantum computer. Quantum supremacy is when a quantum computer can carry out calculations that classical computers practically cannot.