Will these pictures give you some idea of what their secret is ? Maybe there is no secret !
The Ulam spiral is a way of visualizing the distribution of prime numbers (black dots in the image and blue in the movie below). This pattern is one the great unsolved mysteries in mathematics and has important consequences in Cryptography.
You create the pattern on an “infinite” grid of squares where you start somewhere and label the square with 1 then move one to the right and label the square 2 then move one up and label it 3 and keep going in a spiral fashion. This is your base grid. Now color or highlight the prime numbers in that grid plane and you get the picture if you use black … Most interesting is the appearance of diagonal straights and other patterns in this …

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