Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 560: | \[{18^{560}-1\over17}\] | 53 × 11 × 13 × 19 × 29 × 41 × 71 × 97 × 113 × 211 × 281 × 449 × 641 × 673 × 881 × 929 × 1373 × 2711 × 2801 × 3697 × 9041 × 13441 × 15101 × 17837 × 80207 × 117251 × 145501 × 1623833 × 3052211 × 4179001 × 4274201 × 5105857 × 32222107 × 113607841 × 4476462481<10> × 22576710941<11> × 6601276054801<13> × 6139221193320769<16> × 17540298339207841<17> × 29420891411500261<17> × 137841514501966721<18> × 2502562263954390776321<22> × 4164889456901862302881<22> × 361981632928757554946658433<27> × 3436233498896810902837947821<28> × 84895222768060262466596250446741089<35> × 23007113434668367286031526391280991361<38> × 485888625348888473631868038151981373135440320080988916620935197249719166188919306848766474533028222553222401<108> × [17436829914510505232747016800472754659616671732002990392043164604914540401448781200596511979844146615828325158962985968432908795367248655572657179326693063264313686356410669063273247491829497432005601<200>] |