3,306
3,306 is the default port for MySQL databases.
- Even
- Composite
Where 3,306 fits
Why 3,306 is special
3306 is a number worth recognising in a firewall rule. It is MySQL's registered default, and because so many installations never change it, an exposed 3306 is one of the most-scanned ports on the internet — the database equivalent of leaving a labelled key under the mat.
3,306 connects to:
- 5432 — appears alongside
- assigned identifiers — appears in
Same number, different meanings
How 3,306 is understood across different contexts — never implying one meaning because of another.
- Mathematics
3306 is a number worth recognising in a firewall rule. It is MySQL's registered default, and because so many installations never change it, an exposed 3306 is one of the most-scanned ports on the internet — the database equivalent of leaving a labelled key under the mat.
- Everyday life
A database exposed on its default port is found by automated scanning within minutes. Standard practice is to bind it to a private interface or tunnel it, so the port is reachable only from the application that needs it.
- History
MySQL was first released in 1995, when databases sat on the same trusted local network as the applications using them. The default port survived into an era of cloud hosting where that assumption no longer holds.
- Technology & computing
Because MySQL's default is rarely changed, an exposed 3306 is among the most probed ports on the public internet. Network telemetry consistently ranks it near the top of automated scanning traffic — not because the software is weak, but because the number is so predictable.
3,306 is part of
Factors & digit properties
- Divisors (16)
- 1, 2, 3, 6, 19, 29, 38, 57, 58, 87, 114, 174, 551, 1102, 1653, 3306
- Prime factorisation
- 2 × 3 × 19 × 29
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 3306
- Scientific notation
- 3.306 × 10^3
Roman numerals
M M M C C C V I
Binary
1 1 0 0 1 1 1 0 1 0 1 0
1 × 2,048 + 1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 3,306
Octal
6 3 5 2
6 × 512 + 3 × 64 + 5 × 8 + 2 × 1 = 3,306
Hexadecimal
c e a
c × 256 + e × 16 + a × 1 = 3,306
Read as powers of two: 2,048 + 1,024 + 128 + 64 + 32 + 8 + 2 = 3,306.
In historical numeral systems
Egyptian
3 lotuses, 3 coils of rope, 6 strokes
3 × 1,000 + 3 × 100 + 6 × 1 = 3,306. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
5 corner wedges + 5 vertical wedges (sixties place), 6 vertical wedges (units place)
55 × 60 + 6 = 3306. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
Related numbers & connections
The two default database ports, PostgreSQL and MySQL. Both are left unchanged almost everywhere, which makes them among the most scanned ports on the public internet.
View 5432 →Numbers Around Us
- appears alongside5432
why?
Strength 0.50, confidence "high".
- appears inNumbers assigned as identifiers
why?
Strength 0.50, confidence "high".
Everyday life
A database exposed on its default port is found by automated scanning within minutes. Standard practice is to bind it to a private interface or tunnel it, so the port is reachable only from the application that needs it.
DocumentedEveryday lifeGeography: GlobalPeriod: 1995–
History
MySQL was first released in 1995, when databases sat on the same trusted local network as the applications using them. The default port survived into an era of cloud hosting where that assumption no longer holds.
DocumentedHistoryGeography: GlobalPeriod: 1995–
Technology & computing
Because MySQL's default is rarely changed, an exposed 3306 is among the most probed ports on the public internet. Network telemetry consistently ranks it near the top of automated scanning traffic — not because the software is weak, but because the number is so predictable.
DocumentedTechnology & computing
Common questions
Is 3,306 a prime number?
No, 3,306 is not prime.
What are the factors of 3,306?
The factors of 3,306 are 1, 2, 3, 6, 19, 29, 38, 57, 58, 87, 114, 174, 551, 1102, 1653, 3306.
What is 3,306 in Roman numerals?
3,306 in Roman numerals is MMMCCCVI.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 3 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026