Also known as monodigit
In recreational mathematics, a repdigit or sometimes monodigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal). The word is a portmanteau of "repeated" and "digit". Examples are 11, 666, 4444, and 999999. All repdigits are palindromic numbers and are multiples of repunits. Other well-known repdigits include the repunit primes and in particular the Mersenne primes (which are repdigits when represented in binary).
Wikidata facts
- Subclass of
- palindromic number
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- described at URL
- www.dw.com/de/schnapszahl/a-4589175
- maintained by WikiProject
- WikiProject Mathematics
- facet of
- recreational mathematics
Sources (1)
via Wikidata · CC0
Article · 中文
在娛樂數學裡，純位數為一由相同位元重複而組成的自然數，通常指在十進位裡。亦可指其他的進位，如156在五進位內即為純位數(1111)。 例如11、222、4444、77777及999999。所有的純位數都是迴文數，以及循環單位的倍數。 在進位之下，數字為（）的位純位數，其數值為。 舉例來說，十進位底下 77777 的數值為，十六進位底下 77777 則為
Abstract from DBpedia / Wikipedia · CC BY-SA