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Prime spirals is also called as **Ulam spirals**. It was discovered by the polish – American mathematician **Stanislaw Ulam** in 1963.

When the prime number is marked in the rectangular grid, all the prime numbers arranged in the diagonal pattern except the prime number 2. More predominant fact is that prime diagonal line pattern occurs irrespective of the number which is started at the center. This spirals are applicable for large set of prime numbers.

Prime spirals can be constructed by making a rectangular grid, starting with the 1 at the center and developing the spiraling outside.

Ulam collabrated with Myron Stein to produce pictures of spiral for numbers up to 65,000. When the large set of spiral for the prime numbers are plotted, we can see the clear diagonal pattern of prime integers, with some lines stronger than the other line.

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Daily Maths Topic Today - prime spirals (ulam spirals).