{"adoption": {"forks": 680, "observed_at": "2026-08-28T04:05:59.397559+00:00", "stars": 1960}, "canonical_url": "https://ross.abutalabs.com/products/project-euler-solutions", "card": {"archived": false, "artifact_type": "learning-resource", "description": "Runnable code for solving Project Euler problems in Java, Python, Mathematica, Haskell.", "domain": ["mathematics", "education", "programming-languages"], "enriched": true, "function": ["developer-tools", "math", "benchmarking"], "health_score": 20, "homepage": "https://www.nayuki.io/page/project-euler-solutions", "language": "Java", "license": null, "license_family": "other", "maturity": "active", "member_repos": ["nayuki/Project-Euler-solutions"], "name": "nayuki/Project-Euler-solutions", "platform": ["jvm", "python", "cross-platform"], "pushed_at": "2024-05-26T10:47:02+00:00", "repo": "nayuki/Project-Euler-solutions", "stars": 1960, "tags": ["project-euler", "number-theory", "competitive-programming", "dynamic-programming", "haskell", "mathematica", "solutions", "proofs", "algorithms"], "topics": ["java", "python", "mathematica", "project-euler", "math", "mathematics", "competitive-programming", "number-theory", "algorithms", "proofs", "dynamic-programming", "recursion", "haskell"], "urls": [], "use_cases": ["study solutions to project euler problems", "learn number theory algorithms with proofs", "compare java and python implementations of math algorithms", "practice competitive programming techniques", "find dynamic programming examples for math puzzles", "learn haskell through math problem solving"], "what_it_is": "A collection of runnable solutions to Project Euler math/programming problems, written in Java, Python, Mathematica, and Haskell, with benchmark timings and mathematical proofs of correctness. It serves as a reference for learning algorithmic problem-solving techniques rather than as a reusable software library.", "when_to_avoid": ["you need a reusable library for production applications", "you want to avoid spoilers for unsolved Project Euler problems", "you need a licensed, redistributable codebase (no license is provided)"], "when_to_choose": ["you want well-documented, proven-correct solutions to Project Euler problems", "you want to study idiomatic Java, Python, Mathematica, or Haskell for algorithmic math", "you want benchmark timings to compare algorithm efficiency"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/project-euler-solutions", "repo": "nayuki/Project-Euler-solutions", "role": "main", "score": 32}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:05:59.397559+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T03:05:48.104839+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e6ddf49756461d50cd01dfb46238eb94af77e7022d7ebcd95fec99341fc33328", "fetched_at": "2026-08-29T10:45:43.837159+00:00", "kind": "homepage", "missing": false, "url": "https://www.nayuki.io/page/project-euler-solutions"}, {"content_hash": "b0510b4ac972e7cc9452dbfa9f19ab49eb43ff22616f1c953603c64eac885dee", "fetched_at": "2026-08-29T10:45:43.840563+00:00", "kind": "site_page", "missing": false, "url": "https://www.nayuki.io/page/about"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 35}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": ["no_releases", "no_license", "no_readme"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 5561, "days_push": 829, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 32, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}