 Project Euler solutions

ID: project-euler-solutions

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Project Euler solutions by

Ciro Santilli 40 2026-01-30

Repositories of numerical solutions:

Repositories of code solutions:

euler.stephan-brumme.com/ large number of solutions in C++, stopped around 600. Informal permissive license, e.g. at: euler.stephan-brumme.com/243/
I hope you enjoy my code and learn something - or give me feedback how I can improve my solutions.
All of my solutions can be used for any purpose and I am in no way liable for any damages caused.
You can even remove my name and claim it's yours. But then you shall burn in hell.
Asked for a more formal open license at: github.com/stbrumme/euler/issues/7
www.ivl-projecteuler.com/home 330+ solutions in Python as of 2025. Random looking problem selection. On GitHub: github.com/igorvanloo/Project-Euler-Explained under Unlicense license, a public domain license.
www.nayuki.io/page/project-euler-solutions. Large number of solutions, mostly in Java and Python primarily but also Mathematica and Haskell sometimes. Proprietary license.

Repositories with hints but no solutions:

github.com/RodericGuigoCorominas/project-euler

Basically no one has ever had the patience to create a single source that solves them all, all the above were done by individuals and stopped at some point. What we need is either a collaborative solution, or... LLMs.

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