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Title: feat: add repunit theorem helpers by nickzerjeski · Pull Request #1892 · TheAlgorithms/JavaScript · GitHub

Open Graph Title: feat: add repunit theorem helpers by nickzerjeski · Pull Request #1892 · TheAlgorithms/JavaScript

X Title: feat: add repunit theorem helpers by nickzerjeski · Pull Request #1892 · TheAlgorithms/JavaScript

Description: Describe your change: Add an algorithm? Fix a bug or typo in an existing algorithm? Documentation change? Added repunit theorem utilities in Maths/RepunitTheorem.js: multiplicative order of 10 modulo a prime theorem-based repunit divisibility check repunit modulo computation without constructing huge integers 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. 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}. Tests npm test -- RepunitTheorem

Open Graph Description: Describe your change: Add an algorithm? Fix a bug or typo in an existing algorithm? Documentation change? Added repunit theorem utilities in Maths/RepunitTheorem.js: multiplicative order of 1...

X Description: Describe your change: Add an algorithm? Fix a bug or typo in an existing algorithm? Documentation change? Added repunit theorem utilities in Maths/RepunitTheorem.js: multiplicative order of 1...

Opengraph URL: https://github.com/TheAlgorithms/JavaScript/pull/1892

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1019ed7 feat: add repunit theorem helpers nickzerjeski Apr 13, 2026 https://Github.com/TheAlgorithms/JavaScript/pull/1892/commits/1019ed7bcf6bd3f0b5c8049fe0eb62f8b918faf6
84b352f test: cover repunit theorem validation branches nickzerjeski Apr 13, 2026 https://Github.com/TheAlgorithms/JavaScript/pull/1892/commits/84b352f71f21f19f13095d4a1528c080d096eb4b
140bffd Updated Documentation in README.md nickzerjeski Apr 13, 2026 https://Github.com/TheAlgorithms/JavaScript/pull/1892/commits/140bffd025f0ed098fefcca219b125179ede7359
45aa3f4 Fix repunit divisibility edge case for prime 3 nickzerjeski Apr 13, 2026 https://Github.com/TheAlgorithms/JavaScript/pull/1892/commits/45aa3f444621bb832e2b47f1c8d9a392eaf75a35
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