Fermat: "All my numbers are prime!" Euler: "Actually, your F 5 = 4,294,967,297 factors as 641 × 6,700,417." The rest of us: *mind explosion* Euler was out here factoring 10-digit numbers BY HAND in the 1700s while I need a calculator to figure out the tip at restaurants. The man wasn't just a mathematician—he was basically the Chuck Norris of number theory. No computers, no calculators, just pure brain power and probably a quill pen that was equally terrified of him. And we think we're clever for solving Wordle.