What ACT score do you have to achieve be a genius?

There's no ACT score that defines genius. Genius is a complex concept with no single, universally accepted definition or measurable threshold. While a very high ACT score might indicate exceptional academic aptitude, it doesn't encompass the broader range of abilities and characteristics often associated with genius, such as creativity, innovation, leadership, and impact on a field. A high ACT score is a strong indicator of academic potential, but it's not a measure of genius.