fix: cleanup CoPrimeCheck

[vil02]

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Describe your change:

This PR cleans-up the CoPrimeCheck:

• the error is now thrown,

• negative inputs are handled correctly.

• Add an algorithm?

• Fix a bug or typo in an existing algorithm?

• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new JavaScript files are placed inside an existing directory.
• All filenames should use the UpperCamelCase (PascalCase) style. There should be no spaces in filenames.
  Example:UserProfile.js is allowed but userprofile.js,Userprofile.js,user-Profile.js,userProfile.js are not
• All new algorithms have a URL in their comments that points to Wikipedia or another similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.63%. Comparing base (fb0a99c) to head (b5b8083).

Additional details and impacted files

@@ Coverage Diff @@## master #1609 +/- ## ========================================== + Coverage 83.62% 83.63% +0.01%  ========================================== Files 377 377 Lines 19745 19745 Branches 2910 2913 +3 ========================================== + Hits 16511 16513 +2 + Misses 3234 3232 -2 

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