Numberwise

8445

RFC 8445 defines ICE.

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Where 8445 fits

Where 8445 fits: Mathematics, Technology, Related numbersMathematics: Lucky number (mathematical sieve). Technology: Numbers that make the internet work. Related numbers: 5245, 8656.MathematicsLucky number (mathematical …TechnologyNumbers that make the inter…Related numbers524586568445
8445 connects to 3 worlds: mathematics, technology, related numbers.

Why 8445 is special

It gathers every possible path between two peers, tests them all in parallel and uses whichever works, rather than trying to reason about the network.

8445 is part of

Internet and web numbersNumbers around us

Factors & digit properties

Divisors (8)
1, 3, 5, 15, 563, 1689, 2815, 8445
Prime factorisation
3 × 5 × 563
Digit sum
21
Digital root
3

Representations

Decimal
8445
Scientific notation
8.445 × 10^3

Roman numerals

Roman numerals as modelled here goes up to 3,999.

Binary

1 0 0 0 0 0 1 1 1 1 1 1 0 1

1 × 8,192 + 0 × 4,096 + 0 × 2,048 + 0 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 8,445

Octal

2 0 3 7 5

2 × 4,096 + 0 × 512 + 3 × 64 + 7 × 8 + 5 × 1 = 8,445

Hexadecimal

2 0 f d

2 × 4,096 + 0 × 256 + f × 16 + d × 1 = 8,445

Read as powers of two: 8,192 + 128 + 64 + 32 + 16 + 8 + 4 + 1 = 8,445.

In historical numeral systems

Egyptian

8 lotuses, 4 coils of rope, 4 hobbles, 5 strokes

8 × 1,000 + 4 × 100 + 4 × 10 + 5 × 1 = 8,445. 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

Related numbers & connections

Documented appearance
Interactive connectivity establishment tests every possible path in parallel rather than reasoning about the network.

Interactive connectivity establishment tests every possible path in parallel rather than reasoning about the network.

Connection
ICE was respecified after its original state machine proved too complicated to implement consistently.

ICE was respecified after its original state machine proved too complicated to implement consistently.

View 5245 →

Numbers Around Us

  • appears inNumbers that make the internet work
    why?

    Strength 0.50, confidence "high".

Other connections

  • developed from5245
    why?

    Strength 0.50, confidence "high".

  • is associated with8656
    why?

    Strength 0.50, confidence "high".

How is 8445 connected to another number? →

Technology & computing

  • RFC 8445 specifies Interactive Connectivity Establishment, which collects host, reflexive and relayed candidates and performs connectivity checks to select a working path.

    DocumentedTechnology & computingGeography: International — IETFPeriod: 2018

Common questions

Is 8445 a prime number?

No, 8445 is not prime.

What are the factors of 8445?

The factors of 8445 are 1, 3, 5, 15, 563, 1689, 2815, 8445.

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