repunit

Noun

1. A repdigit consisting only of one or more occurrences of the digit 1.
   • 11, 111, and 1,111 are repunits.
   • 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...
   • In this study is introduced a novel generalization of repunit and one-zero numbers through the formulation of the generalized One-kZero. - 2025 November 20, Paula M. M. C. Catarino, Grieg A. Costa, Eudes A. Costa, “On...