factor.pl command not found

Introduction

When you run more command in linux terminal / console, you get the following error message

factor.pl: command not found

or when using sudo you get the following error message

sudo: factor.pl: command not found

Solutions to factor.pl: command not found

How To Fix factor.pl: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu factor.pl is provided by libmath-prime-util-perl package.

libmath-prime-util-perl is:

Math::Prime::Util is a set of perl utilities related to prime numbers. These include multiple sieving methods, is_prime, prime_count, nth_prime, approximations and bounds for the prime_count and nth prime, next_prime and prev_prime, factoring utilities, and more.

The default sieving and factoring are intended to be (and currently are) the fastest on CPAN, including Math::Prime::XS, Math::Prime::FastSieve, Math::Factor::XS, Math::Prime::TiedArray, Math::Big::Factors, Math::Factoring, and Math::Primality (when the GMP module is available). For numbers in the 10-20 digit range, it is often orders of magnitude faster. Typically it is faster than Math::Pari for 64-bit operations.

All operations support both Perl UV’s (32-bit or 64-bit) and bignums. It requires no external software for big number support, as there are Perl implementations included that solely use Math::BigInt and Math::BigFloat. However, performance will be improved for most big number functions by installing Math::Prime::Util::GMP, and is definitely recommended if you do many bignum operations. Also look into Math::Pari as an alternative.

To fix this problem, we can install more using the command below.

sudo apt-get -y install libmath-prime-util-perl

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install libmath-prime-util-perl.

sudo apt -y install libmath-prime-util-perl

Or if you have aptitude installed you can use the following command.

sudo aptitude install libmath-prime-util-perl

Summary

In this tutorial we learn how to fix factor.pl command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.