11, 111, and 1,111 are repunits.
Source: wiktionary
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3 total sentences available.
11, 111, and 1,111 are repunits.
Source: wiktionary
The only known prime repunits are R2, R19, R23, and more recently R317 (discovered by Williams in 1978) and R1031 (discovered by Williams & Dubner in 1986). Moreover, Dubner has determined that for every other prime p less than 10000, the repunit Rp is composite.
Source: wiktionary
In this study is introduced a novel generalization of repunit and one-zero numbers through the formulation of the generalized One-kZero.
Source: wiktionary
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.