1958
1958 is the year the integrated circuit was demonstrated.
- Even
- Composite
Where 1958 fits
Why 1958 is special
Jack Kilby built the first working example in September and Robert Noyce independently developed a more manufacturable version months later. Putting many components on one piece of semiconductor is the step that everything digital since depends on.
Same number, different meanings
How 1958 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Jack Kilby built the first working example in September and Robert Noyce independently developed a more manufacturable version months later. Putting many components on one piece of semiconductor is the step that everything digital since depends on.
- History
In 1958, NASA was established, and the integrated circuit was demonstrated (North America).
- Technology & computing
Jack Kilby demonstrated the first working integrated circuit in September 1958 and Robert Noyce independently produced a more manufacturable design shortly after. Putting many components onto one piece of semiconductor is the step everything digital depends on.
1958 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 11, 22, 89, 178, 979, 1958
- Prime factorisation
- 2 × 11 × 89
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 1958
- Scientific notation
- 1.958 × 10^3
Roman numerals
M C M L V I I I
MCMLVIII uses the subtractive pair CM: a hundred before a thousand — a thousand minus a hundred.
Binary
1 1 1 1 0 1 0 0 1 1 0
1 × 1,024 + 1 × 512 + 1 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 1,958
Octal
3 6 4 6
3 × 512 + 6 × 64 + 4 × 8 + 6 × 1 = 1,958
Hexadecimal
7 a 6
7 × 256 + a × 16 + 6 × 1 = 1,958
Read as powers of two: 1,024 + 512 + 256 + 128 + 32 + 4 + 2 = 1,958.
In historical numeral systems
Egyptian
1 lotus, 9 coils of rope, 5 hobbles, 8 strokes
1 × 1,000 + 9 × 100 + 5 × 10 + 8 × 1 = 1,958. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 corner wedges + 2 vertical wedges (sixties place), 3 corner wedges + 8 vertical wedges (units place)
32 × 60 + 38 = 1958. Places are separated by a space on the tablet, with the higher place written first.
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
Related numbers & connections
1958 is a year in the 20th century, in the 1950s.
Kilby demonstrated an integrated circuit in 1958; Noyce's silicon design the following year is the one that could be manufactured at scale, and every processor since descends from it.
View 1959 →History
In 1958, NASA was established, and the integrated circuit was demonstrated (North America).
DocumentedHistoryGeography: North AmericaPeriod: 1958
Technology & computing
Jack Kilby demonstrated the first working integrated circuit in September 1958 and Robert Noyce independently produced a more manufacturable design shortly after. Putting many components onto one piece of semiconductor is the step everything digital depends on.
DocumentedTechnology & computingPeriod: 1958
Common questions
Is 1958 a prime number?
No, 1958 is not prime.
What are the factors of 1958?
The factors of 1958 are 1, 2, 11, 22, 89, 178, 979, 1958.
What is 1958 in Roman numerals?
1958 in Roman numerals is MCMLVIII. CM is subtractive: a hundred before a thousand — a thousand minus a hundred. Written additively it would be MDCCCCLVIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026