5681
RFC 5681 specifies TCP congestion control.
- Odd
- Composite
Where 5681 fits
Why 5681 is special
Slow start, congestion avoidance, fast retransmit and fast recovery are defined here, and they are why the internet did not collapse under load in 1986.
5681 is part of
Factors & digit properties
- Divisors (8)
- 1, 13, 19, 23, 247, 299, 437, 5681
- Prime factorisation
- 13 × 19 × 23
- Digit sum
- 20
- Digital root
- 2
Representations
- Decimal
- 5681
- Binary
- 1011000110001
- Octal
- 13061
- Hexadecimal
- 1631
- Scientific notation
- 5.681 × 10^3
Other mathematical patterns
- Deficient number
Related numbers & connections
TCP congestion control is why the internet did not collapse under load in the late 1980s.
RACK-TLP infers loss from transmission times rather than duplicate acknowledgement counts.
View 8985 →Numbers Around Us
- appears inNumbers that make the internet work
why?
Strength 0.50, confidence "high".
Technology & computing
RFC 5681 specifies the standard TCP congestion control algorithms. Their introduction followed the congestion collapse episodes observed on the early internet.
DocumentedTechnology & computingGeography: International — IETFPeriod: 2009
Common questions
Is 5681 a prime number?
No, 5681 is not prime.
What are the factors of 5681?
The factors of 5681 are 1, 13, 19, 23, 247, 299, 437, 5681.
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