PrimeGenerators - Prime Number Generation and Utilities

Command Line Interface

The prime generator can be run from the command line. The output can be piped or redirected to a separate file or process.

usage: primegenerators [-h] [-c COUNT] [-f {text,json}]

Random number generator and analyzer.

options:
  -h, --help            show this help message and exit
  -c COUNT, --count COUNT
                        The number of values to generate
  -f {text,json}, --format {text,json}
                        The format of the output

Python Library

The prime generator should be created using the factory method, e.g.:

from primegenerators import get_generator

# Details elided

generator = get_generator("eratosthenes")

for index, prime in enumerate(generator.primes()):
    sys.stdout.write(str(prime))

    # Further processing and exit conditions

Member Functions

primes() -> Iterator[int]

Generate an endless series of prime numbers, starting with 2.

Returns an iterator over the series of prime numbers.

primes_range(minimum: int, maximum: int) -> Iterator[int]

Return an iterator over the series of prime numbers between minimum and maximum inclusive.

minimum: The minimum number in the series. If this number is not prime, the first number in the series is the first prime higher than this number.

maximum: The maximum number in the series. If this number is not prime, the last number in the series is the last prime lower than this number.

is_prime(number: int) -> bool

Determine whether a given number is prime or not.

number: The number to be checked for prime-ness

Returns True if the candidate number is prime, otherwise False

prime_factors(self, number: int) -> Counter

Calculate the prime factors of a number.

number: The number to be factorized

Returns a collections.Counter object containing the prime factors of number

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