Owlet puzzle #14
Released Sunday, July 19, 2026 UTC
65537
the answer for puzzle #14
The five clues
- A five-digit number.
- A Fermat prime.
- The fifth (and largest known) Fermat prime.
- Equal to 2¹⁶ + 1.
- Gauss proved the regular 65537-gon is constructible with compass and straightedge.
Backstory
F₄ = 65537 is prime; F₅ through F₃₂ are all composite. Only five known Fermat primes: 3, 5, 17, 257, 65537.
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