trprimes 0.1.1

Truncatable prime number generators

Truncatable primes

A Python library that generates that generates sequences of truncatable prime numbers and derivatives of the sequences in the form of a package that can be installed and imported.

A truncatable prime is still prime when number is truncated. For example, 317 is a left truncatable prime because 17 and 7 are prime. It is also a right truncatable prime because 31 and 3 are prime.

The intention of this library is to provide code that is reasonably efficient and readable. It is not difficult to track down cryptic one-liner code that produces identical results.

Getting Started

Python 3 is assumed.

Installing

Using the source code from github

git clone https://github.com/harry-zuzan/trprimes.git
cd trprimes
python setup.py install

Using pip

pip install trprimes

Examples

from trprimes import trunc

# the number of left truncatable primes
trunc.count_ltrunc()

# the largest of left truncatable prime
trunc.largest_ltrunc()

# iterate through left truncatable primes in ascending order
ltp = trunc.ordered_ltrunc()
next(ltp)