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abc conjecture

math Maturity 11-13 Next article →

Math people love puzzles.

David Masser
David Masser

In 1985, Joseph Oesterlé and David Masser found a big one. It is called the abc conjecture. This puzzle uses three positive numbers. We call them a, b, and c. They follow a simple rule: a + b = c.

Oesterle Joseph
Oesterle Joseph

To solve the puzzle, we look at prime factors. A prime factor is a basic building block of a number. We use these to find the "radical" of the numbers. The radical is the product of all the distinct prime factors. The conjecture says that c is usually not much bigger than this radical. Most of the time, the radical of a, b, and c is larger than c. Some special sets of numbers are exceptions to this rule. These special sets have a high "quality." A man named Eric Reyssat found a very high quality set. His set had a quality of 1.6299. Many math experts think this conjecture is very important. If it is true, it could help solve other hard math problems. For now, it remains one of the biggest unsolved mysteries.

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