pnGrenze

Could you clarify what pnGrenze refers to? I couldn’t locate a widely recognized definition or article about this term. Providing the intended domain or a source would help me write a concise, neutral wiki-style article under 300 words. For example, is pnGrenze:

- a mathematical concept (perhaps a boundary related to prime numbers),

- a geographic or political boundary or place,

- a software project or technical term,

- a term from literature or culture, or

- something else?

If you’d like, I can also draft a fictional, neutral stub about pnGrenze as a placeholder concept, clearly labeled as fictional. Please share the domain or context you prefer.