public void testBinomialLarge() {
    runBinomialTest(31, 100);
  }

  // Depends on the correctness of BigIntegerMath.factorial
  private static void runBinomialTest(int firstN, int lastN) {
    for (int n = firstN; n <= lastN; n++) {
      for (int k = 0; k <= n; k++) {
        BigInteger expected =
            BigIntegerMath.factorial(n)
                .divide(BigIntegerMath.factorial(k))

---

## Architecture

### Module Structure

```
fess-crawler-parent/
├── fess-crawler/              # Core framework
├── fess-crawler-lasta/        # LastaFlute DI integration
└── fess-crawler-opensearch/   # OpenSearch backend
```

### Key Design Patterns

**Factory**: `CrawlerClientFactory`, `ExtractorFactory` - protocol/format-specific component selection

			<artifactId>fess-crawler</artifactId>
			<version>${project.version}</version>
		</dependency>
		<dependency>
			<groupId>org.lastaflute</groupId>
			<artifactId>lasta-di</artifactId>
			<version>${lasta.di.version}</version>
		</dependency>
		<dependency>
			<groupId>jakarta.transaction</groupId>
			<artifactId>jakarta.transaction-api</artifactId>
			<version>${jakarta.transaction.version}</version>

			<artifactId>fesen-httpclient</artifactId>
			<version>${fesen.httpclient.version}</version>
		</dependency>
		<dependency>
			<groupId>org.lastaflute</groupId>
			<artifactId>lasta-di</artifactId>
			<version>${lasta.di.version}</version>
		</dependency>
		<dependency>
			<groupId>jakarta.transaction</groupId>
			<artifactId>jakarta.transaction-api</artifactId>
			<version>${jakarta.transaction.version}</version>

- [Deutsch (German)](docs/de/README.md)
- [한국어 (Korean)](docs/ko/README.md)

## Powered By

* [Lasta Di](https://github.com/lastaflute/lasta-di "Lasta Di"): DI Container
* [LastaFlute](https://github.com/lastaflute/lastaflute "LastaFlute"): Web Framework
* [Lasta Job](https://github.com/lastaflute/lasta-job "Lasta Job"): Job Scheduler
* [Fess Crawler](https://github.com/codelibs/fess-crawler "Fess Crawler"): Web Crawler

- [Deutsch (German)](../de/README.md)
- [한국어 (Korean)](../ko/README.md)

## Impulsado por

* [Lasta Di](https://github.com/lastaflute/lasta-di "Lasta Di"): Contenedor DI
* [LastaFlute](https://github.com/lastaflute/lastaflute "LastaFlute"): Framework Web
* [Lasta Job](https://github.com/lastaflute/lasta-job "Lasta Job"): Programador de Tareas
* [Fess Crawler](https://github.com/codelibs/fess-crawler "Fess Crawler"): Rastreador Web

- [Deutsch (German)](../de/README.md)
- [한국어 (Korean)](../ko/README.md)

## Alimenté par

* [Lasta Di](https://github.com/lastaflute/lasta-di "Lasta Di") : Conteneur DI
* [LastaFlute](https://github.com/lastaflute/lastaflute "LastaFlute") : Framework Web
* [Lasta Job](https://github.com/lastaflute/lasta-job "Lasta Job") : Planificateur de tâches
* [Fess Crawler](https://github.com/codelibs/fess-crawler "Fess Crawler") : Crawler Web

- [Deutsch (German)](../de/README.md)
- [한국어 (Korean)](../ko/README.md)

## Desenvolvido por

* [Lasta Di](https://github.com/lastaflute/lasta-di "Lasta Di"): Contêiner DI
* [LastaFlute](https://github.com/lastaflute/lastaflute "LastaFlute"): Framework Web
* [Lasta Job](https://github.com/lastaflute/lasta-job "Lasta Job"): Agendador de Tarefas
* [Fess Crawler](https://github.com/codelibs/fess-crawler "Fess Crawler"): Rastreador Web

- [Français (French)](../fr/README.md)
- [한국어 (Korean)](../ko/README.md)

## Unterstützt von

* [Lasta Di](https://github.com/lastaflute/lasta-di "Lasta Di"): DI-Container
* [LastaFlute](https://github.com/lastaflute/lastaflute "LastaFlute"): Web-Framework
* [Lasta Job](https://github.com/lastaflute/lasta-job "Lasta Job"): Job-Scheduler
* [Fess Crawler](https://github.com/codelibs/fess-crawler "Fess Crawler"): Web-Crawler

- [Deutsch (German)](../de/README.md)
- [한국어 (Korean)](../ko/README.md)

## 技术支持

* [Lasta Di](https://github.com/lastaflute/lasta-di "Lasta Di"): DI 容器
* [LastaFlute](https://github.com/lastaflute/lastaflute "LastaFlute"): Web 框架
* [Lasta Job](https://github.com/lastaflute/lasta-job "Lasta Job"): 任务调度器
* [Fess Crawler](https://github.com/codelibs/fess-crawler "Fess Crawler"): Web 爬虫