4291
RFC 4291 defines the IPv6 addressing architecture.
- Odd
- Composite
Where 4291 fits
Why 4291 is special
A 128-bit address gives about 340 undecillion possibilities — enough to assign more addresses to every square millimetre of Earth than IPv4 had in total. The abundance is deliberate, to make address conservation unnecessary.
Factors & digit properties
- Divisors (4)
- 1, 7, 613, 4291
- Prime factorisation
- 7 × 613
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 4291
- Scientific notation
- 4.291 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 0 0 0 0 1 1 0 0 0 0 1 1
1 × 4,096 + 0 × 2,048 + 0 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 4,291
Octal
1 0 3 0 3
1 × 4,096 + 0 × 512 + 3 × 64 + 0 × 8 + 3 × 1 = 4,291
Hexadecimal
1 0 c 3
1 × 4,096 + 0 × 256 + c × 16 + 3 × 1 = 4,291
Read as powers of two: 4,096 + 128 + 64 + 2 + 1 = 4,291.
In historical numeral systems
Egyptian
4 lotuses, 2 coils of rope, 9 hobbles, 1 stroke
4 × 1,000 + 2 × 100 + 9 × 10 + 1 × 1 = 4,291. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
- Deficient number
- Semiprime
Related numbers & connections
The documentation prefix is carved from the IPv6 address space that RFC 4291 defines.
View 3849 →Technology & computing
IPv6's address space is vastly larger than any projected need, specifically so that conservation measures like NAT become unnecessary. The waste is the feature.
DocumentedTechnology & computingPeriod: 2006
Common questions
Is 4291 a prime number?
No, 4291 is not prime.
What are the factors of 4291?
The factors of 4291 are 1, 7, 613, 4291.
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: 15 July 2026