1983
1983 is the year the internet switched to TCP/IP.
- Odd
- Composite
Where 1983 fits
Why 1983 is special
On 1 January 1983 ARPANET moved to the protocol suite the internet still runs on, which is why the date is sometimes called the internet's birthday. The same year, a Soviet officer correctly judged a missile-attack alert to be a false alarm.
Factors & digit properties
- Divisors (4)
- 1, 3, 661, 1983
- Prime factorisation
- 3 × 661
- Digit sum
- 21
- Digital root
- 3
Representations
- Decimal
- 1983
- Binary
- 11110111111
- Octal
- 3677
- Hexadecimal
- 7bf
- Roman numeral
- MCMLXXXIII
- Scientific notation
- 1.983 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
BGP carries the routing between independent networks, and the internet it routes for switched to TCP/IP in 1983. Routing between autonomous networks is what made a network of networks possible.
View 179 →Technology & computing
ARPANET switched to TCP/IP on 1 January 1983, which is the protocol suite the internet still runs on and the reason the date is sometimes given as its birthday. The same year, a Soviet officer correctly judged a missile-attack warning to be a false alarm.
DocumentedTechnology & computingPeriod: 1983
Common questions
Is 1983 a prime number?
No, 1983 is not prime.
What are the factors of 1983?
The factors of 1983 are 1, 3, 661, 1983.
What is 1983 in Roman numerals?
1983 in Roman numerals is MCMLXXXIII.
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