What Is The Feynman Point?

Feynman Diagram Digital Art by Ram Vasudev from fineartamerica.com


Have you ever heard of the Feynman Point? It is a fascinating number that has captured the attention of mathematicians and enthusiasts alike. In this article, we will explore what the Feynman Point is, its significance, and how it came to be discovered.


The Feynman Point is named after physicist Richard Feynman, who discovered it in the early 1940s. It is a sequence of six consecutive 9s that appears in the decimal expansion of the mathematical constant pi (π). In other words, starting from the 762nd digit of pi, there are six 9s in a row.


At first glance, the Feynman Point may seem like a trivial curiosity. However, it has captivated mathematicians and enthusiasts because of its rarity and unpredictability. Pi is an irrational number, meaning it cannot be expressed as a fraction of two integers. Its decimal expansion goes on infinitely without repeating, making the appearance of the Feynman Point all the more remarkable.

Mathematical Significance

The Feynman Point has no practical implications, but it holds mathematical significance. It is a prime example of a pattern that appears randomly in an otherwise unpredictable sequence. It also highlights the fact that pi is a transcendental number, meaning it is not a root of any non-zero polynomial equation with rational coefficients.

Other points in pi

The Feynman Point is not the only such pattern that appears in pi. There are other points, such as the Beal Conjecture Point and the Bellard Point, which also have a sequence of consecutive digits. These points are named after the mathematicians who discovered them.


While the Feynman Point has no direct practical applications, pi itself is a crucial mathematical constant with many uses in science and engineering. It appears in many formulas and equations, including those for calculating the circumference and area of a circle, the volume of a sphere, and the frequency of a wave.


In conclusion, the Feynman Point is a sequence of six consecutive 9s that appears in the decimal expansion of pi. While it has no practical applications, it holds mathematical significance and highlights the unpredictability of pi. Its discovery by Richard Feynman has captured the imagination of mathematicians and enthusiasts alike, and it continues to be a fascinating topic of study.

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