The (double) Primorial sieve & Prime spirals |
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This website is set up to share the (double) primorial sieve, the unraveling of the Ulam spiral and the segmented prime spirals with the general public.
No effort was made to develope a brand new webdesing. An existing website was ransacked.

This project started in 2008 by placing a prime number on the short side of a primitive Pythagorean triangle.

The results of the (double) primorial sieve led to the unraveling of the Ulam spiral and supplies a possible explanation for
the (9, 1) last digit preverence of prime numbers.

The counterclockwise Ulam spiral in a Cartesian coordinate sytem led to the prime spirals with infinitely many segments.

At the end of 2016 there was no known other claim for the discovery of the (double) primorial sieve or the solving of
the mystery of the Ulam spiral conundrum.

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Introduction: Disclaimer