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).
In the Vinony graph
Within Vinony's link graph, 純位數 is referenced by 283 other articles, and connects out to prime number, numerology and Mersenne prime.
It is catalogued under the topic Base-dependent integer sequences.
Its subject is documented across 19 Wikipedia language editions.
Wikidata facts
- Subclass of
- palindromic number
Show 3 more facts
- 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