25

This number is a composite.

Single Curio View: (Seek other curios for this number)

25 is the sum of the first three Fermat primes (3 + 5 + 17) and the square of the second Fermat prime (5²). [Ahmed]

Submitted: 2026-06-15 09:50:48; Last Modified: 2026-06-15 10:27:20.