Numberwise

3128

Port 3128 is the default port for the Squid caching proxy.

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Where 3128 fits

Where 3128 fits: Related numbersRelated numbers: 1080, 8118.Related numbers108081183128
3128 connects to 1 world: related numbers.

Why 3128 is special

Squid sits between users and the web, caching what it fetches. An accidentally open 3128 becomes an anonymising relay for anyone who finds it, which is why scanning for open proxies on this port is continuous.

Factors & digit properties

Divisors (16)
1, 2, 4, 8, 17, 23, 34, 46, 68, 92, 136, 184, 391, 782, 1564, 3128
Prime factorisation
2^3 × 17 × 23
Digit sum
14
Digital root
5

Representations

Decimal
3128
Binary
110000111000
Octal
6070
Hexadecimal
c38
Roman numeral
MMMCXXVIII
Scientific notation
3.128 × 10^3

Other mathematical patterns

  • Abundant number

Related numbers & connections

Connection
Two kinds of proxy: Squid on 3128 understands HTTP and caches it, while SOCKS on 1080 forwards arbitrary TCP without interpreting it. Both become open relays if exposed.

Two kinds of proxy: Squid on 3128 understands HTTP and caches it, while SOCKS on 1080 forwards arbitrary TCP without interpreting it. Both become open relays if exposed.

View 1080 →

Other connections

  • is associated with1080
    why?

    Strength 0.50, confidence "high".

  • is associated with8118
    why?

    Strength 0.50, confidence "high".

How is 3128 connected to another number? →

Technology & computing

  • Squid caches web content between users and the internet. Left open to the world, port 3128 becomes a relay anyone can route traffic through, which is why scanning for open proxies on it is continuous and automated.

    DocumentedTechnology & computing

Common questions

Is 3128 a prime number?

No, 3128 is not prime.

What are the factors of 3128?

The factors of 3128 are 1, 2, 4, 8, 17, 23, 34, 46, 68, 92, 136, 184, 391, 782, 1564, 3128.

What is 3128 in Roman numerals?

3128 in Roman numerals is MMMCXXVIII.

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