**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.

euclid, a Python code which investigates various versions of Euclid's algorithm for computing the greatest common divisor (GCD) of two integers.

i4lib, a Python code which contains many utility routines, using integer arithmetic.

polpak, a Python code which evaluates a variety of mathematical functions, polynomials, and sequences, including Bell, Benford, Bernoulli, Bernstein, Cardan, Catalan, Charlier, Chebyshev, Collatz, Delannoy, Euler, Fibonacci, Gegenbauer, Gudermannian, Harmonic, Hermite, Hofstadter, Jacobi, Krawtchouk, Laguerre, Lambert, Legendre, Lerch, Meixner, Mertens, Moebius, Motzkin, Phi, Stirling, Tau, Tribonacci, Zernike.

- is_prime.py, the source code.
- is_prime.sh, runs all the tests.
- is_prime.txt, the output file.