Can you edit on that site?arydberg said:
done.OCR said:Can you edit on that site?His last name is spelled Ulam...
Interesting stuff though, thanks for posting...
http://en.wikipedia.org/wiki/Stanislaw_Ulam
http://en.wikipedia.org/wiki/Ulam_spiral
A prime number spiral is a visual representation of prime numbers arranged in a spiral shape. Each number in the spiral is either a prime number or a composite number, with prime numbers being represented by a different color or symbol.
Prime number spirals have been studied by mathematicians for centuries and have been found to exhibit interesting patterns and relationships between prime numbers. They can also be used to visualize the distribution and density of prime numbers.
A prime number spiral is typically constructed by starting with the number 1 in the center and spiraling outwards, adding numbers in a clockwise direction. Prime numbers are highlighted or marked in some way, while composite numbers are left blank.
One of the most well-known patterns is the diagonal lines of prime numbers that appear in some spirals, known as Ulam spirals. Other patterns include concentric circles of prime numbers and the formation of "arms" or "branches" of prime numbers extending from the center of the spiral.
Prime number spirals are used in various mathematical research areas, such as number theory and graph theory. They have also been used in cryptography and in studying the distribution of prime numbers in different number systems. Additionally, prime number spirals have been used as a tool to introduce students to the concept of prime numbers and to spark their interest in mathematics.