6845
The 6845 CRT controller drove the displays of a generation of home and business computers.
- Odd
- Composite
Where 6845 fits
Why 6845 is special
It generated the timing signals a cathode ray tube needed, and programming it outside its documented limits is how demoscene programmers produced effects the hardware was not designed for.
Factors & digit properties
- Divisors (6)
- 1, 5, 37, 185, 1369, 6845
- Prime factorisation
- 5 × 37^2
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 6845
- Binary
- 1101010111101
- Octal
- 15275
- Hexadecimal
- 1abd
- Scientific notation
- 6.845 × 10^3
Other mathematical patterns
- Deficient number
Related numbers & connections
Both generate video timing, but the TMS9918 also composites sprites so the processor does not have to move objects itself.
View 9918 →Technology & computing
The 6845 was driven outside its documented parameters to produce screen modes its designers never intended. That practice — exploiting undocumented behaviour deliberately — is the origin of the demoscene.
DocumentedTechnology & computing
Common questions
Is 6845 a prime number?
No, 6845 is not prime.
What are the factors of 6845?
The factors of 6845 are 1, 5, 37, 185, 1369, 6845.
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