25,565
Port 25565 is the default port for a Minecraft server.
- Odd
- Composite
Where 25,565 fits
Why 25,565 is special
It is probably the port number most widely known to people who have never configured a server for any other reason. A generation learned port forwarding, dynamic DNS and firewall rules in order to let friends join a game, which is a genuine if accidental route into networking.
Factors & digit properties
- Divisors (4)
- 1, 5, 5113, 25565
- Prime factorisation
- 5 × 5113
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 25565
- Binary
- 110001111011101
- Octal
- 61735
- Hexadecimal
- 63dd
- Scientific notation
- 2.557 × 10^4
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
Two game server defaults that between them taught a generation about port forwarding and NAT, which no networking course managed at the same scale.
View 27015 →Numbers Around Us
- appears alongside27015
why?
Strength 0.50, confidence "high".
Technology & computing
25565 is plausibly the port number most familiar to people who have never run any other kind of server. Port forwarding, dynamic DNS and firewall rules were learned by a great many people purely so that friends could join a Minecraft world.
DocumentedTechnology & computing
Common questions
Is 25,565 a prime number?
No, 25,565 is not prime.
What are the factors of 25,565?
The factors of 25,565 are 1, 5, 5113, 25565.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026