How to Identify a Prime Number without a Computer

In the 1800s French mathematician Édouard Lucas spent years proving that this 39-digit number was indeed prime. Lucas, who ...

Sam Altman shares his 'best, accidental' career advice — and why it's the best time to get into computer science

The OpenAI CEO says this is the best time to start a computer science career — and shares the "best, accidental" advice that ...