tables > repunit > 21

Base 21 Repunits

Table

Viewing: 56 – 56 << prev next >>

(available: 0-999)

Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>

56: \[{21^{56}-1\over20}\] 23 × 11 × 13 × 17 × 29 × 43 × 617 × 631 × 3319 × 3697 × 97241 × 912521 × 81867661 × 68454248717<11> × 115593326297<12> × 831380909129<12>

Index range: 56 – 56 << prev next >>