repunit
Sign in to saveIn recreational mathematics, a repunit is a number like 11, 111, or 1111 that contains only the digit 1 — a more specific type of repdigit. The term stands for "repeated unit" and was coined in 1966 by Albert H. Beiler in his book Recreations in the Theory of Numbers.
Key facts
- Integer sequence.name
- Repunit prime
- Integer sequence.terms_number
- 11
- Integer sequence.con_number
- Infinite
- Integer sequence.first_terms
- 11, 1111111111111111111, 11111111111111111111111
- Integer sequence.largest_known_term
- (108177207−1)/9
- Integer sequence.OEIS
- A004022
- Integer sequence.OEIS_name
- Primes of the form (10^n − 1)/9
via Wikipedia infobox
Wikidata facts
- Subclass of
- palindromic number
Show 3 more facts
- facet of
- 1
- maintained by WikiProject
- WikiProject Mathematics
- invariant under
- circular shift
Sources (1)
via Wikidata · CC0