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Maths

What is a prime number?

Episode 741 14:03

In this episode

Did you know there are "rebel numbers" hiding in the world right now that absolutely refuse to follow the rules?! Welcome to the wild, mind-bending world of prime numbers! A prime number is a special number that can only be divided evenly by itself and the number one—like 2, 3, 5, 7, and 11. They are the unbreakable building blocks of mathematics! Over two thousand years ago, a brilliant mathematician named Euclid proved an amazing secret: prime numbers never, ever run out. They go on for infinity! But here is the craziest part: nobody knows the pattern of where the next one will appear! In October 2024, computers found the largest known prime number, and it is so gigantic it has over 41 million digits! Today, we use these massive, unbreakable numbers as secret digital padlocks to keep our phone messages completely safe. Even insects use them! Discover how mysterious 13-year and 17-year cicadas use prime numbers to outsmart hungry predators in the wild. Join Mira and Finn as we unlock the greatest unsolved mystery in mathematics!

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