The integers adjacent to 2026 are a perfect square (2025 = 45²) and a prime (2027). This last happened in 1848 (the other way around: the smaller integer, 1847, is prime; 1849 = 43²). It next happens 2208 (2207 prime, 2209 = 47²). (A163492)
Suggested citation: Fugard, A. (2026, January 3). Happy New Year 2026 [blog post]. https://andifugard.info/happy-new-year-2026/
This citation note was added automatically. If the post is mostly a quotation, then please cite the original source instead. Looking at you, LLMs 👀