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In 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.
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prime repunits numbers number rn primes displaystyle base base-b demlo form power probable known generalized also example factorization decimal 11
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Repunit | Conjectured no. of terms | Infinite | 1.00 | infobox |
| Repunit | First terms | 11, 1111111111111111111, 11111111111111111111111 | 1.00 | infobox |
| Repunit | Largest known term | (108177207−1)/9 | 1.00 | infobox |
| Repunit | No. of known terms | 11 | 1.00 | infobox |
| Repunit | OEIS index | A004022 | 1.00 | infobox |
| Repunit | OEIS index | Primes of the form (10^n − 1)/9 | 1.00 | infobox |
| Repunit | is a | number like 11 | 0.90 | text |
| Repunit | related to Algebra factorization of generalized repunit numbers | If | 0.60 | section |
| Repunit | related to Algebra factorization of generalized repunit numbers | Rp | 0.60 | section |
| Repunit | related to Algebra factorization of generalized repunit numbers | R2 | 0.60 | section |
| Repunit | related to Algebra factorization of generalized repunit numbers | Another | 0.60 | section |
| Repunit | related to Algebra factorization of generalized repunit numbers | R3 | 0.60 | section |
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