The (double) Primorial sieve  &  Prime spirals E-mail

The primorial sieve is a new algorithm in mathematics to distinguish prime numbers. The primorial sieve can be used to find all prime numbers up to a specific integer value and has advantages over the solid  Sieve of Eratosthenes.

The primorial sieve can also be used as a double sieve within a specific range of (very) large integers.
Its basic function mimics  Pritchard's Wheel Factorization (1982),  but the  primorial sieve  is more sophisticated.
See  the (double) primorial sieve.pdf.

The findings of the (double) primorial sieve offered the opening for solving the  Ulam spiral  conundrum.
The mystery of the  Ulam spiral (1963)  is cracked by the discovery of the  eight  families of functions that capture all natural numbers, see  the unraveling of the Ulam spiral.pdf.

The unraveled counterclockwise Ulam spiral with startvalue  0  gave the opening to the infinitely many segmented prime spirals, see  segmented prime spirals.pdf
It is defined that the Ulam spiral is a Ulam four-quarter sprial, and thus a prime spiral with four segments.
Downwards are the prime spirals with respectively three, two and one segments.
Upwards are the prime spirals with five, six, etc segments.

Since the primorial sieve, the unraveling of the Ulam spiral and the segmented prime spirals are relative new, all suggestions and remarks are welcome. They can be sent to: info@primorial-sieve.com

Ing. J.I.M. (Hans) Dicker MEd.
The Netherlands


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