Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 253: | \[{23^{253}-1\over22}\] | 11 × 461 × 1289 × 580889 × 570695137 × 831603031789<12> × 1920647391913<13> × 3937230404603<13> × 72109845317468333<17> × [15216924306633199022174447020566523722674433314397652414197524625715552913513455014481120883271374243513871134630410898404813201310306039010044868218017135990523235875461182661673602231144248738176867016925188372345779452529788947163248088525114199273171125857855440701<269>] |