is_prime, a Python code which implements various versions of the sieve of Eratosthenes to determine whether a given integer is prime.


The computer code and data files made available on this web page are distributed under the GNU LGPL license.


is_prime is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version and an R version.

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Source Code:

Last modified on 29 December 2022.