Prime numbers

Calculates prime numbers, easy and simple, but slow.

Will also measure the execution time of JavaScript.

Input range 3 to 2147483647. The primes
1 and 2 are not calculated.
Number of primes: -     
Execution time: -     
The execution time may be used as a
benchmark of your browser and system.

The measured execution time does not include the browser's update of the user interface.

This page was rewritten on April 28, 2013, including execution time measurement.

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Developed by Anders Danielsson