英和和英

名詞

repunit (plural repunits)

1. A repdigit consisting only of one or more occurrences of the digit 1.

   11, 111, and 1,111 are repunits.

   • 1991, Paulo Ribenboim, The Little Book of Big Primes‎, page 172:

     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.

上位語

• repdigit

アナグラム

• reinput