Repdigit
- 纯位数（纯位数是由相同位元重复组成的自然数，通常指十进制。也可指其他进位，如156在五进位内即为纯位数(1111)）
Repdigit
-
abstract:
In recreational mathematics, a repdigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal). The word repdigit is a portmanteau, formed from repeated digit.
以上来源于:
WordNet