Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 422: | \[{18^{422}-1\over17}\] | 19 × 271611017 × 24220605179<11> × 2007524841781441<16> × 335946629853426569<18> × 15277566603465032877653623<26> × 3226208172534279713363866007233<31> × 4930106900611658538323245495277276167<37> × 310439603136288983140153201665350418222597055097<48> × 2830145077918511154622430653953132986104129929824813830399278323255590009382855303871688417079348013918330503<109> × [173517113787686601060825079601615788369437567410311346193714224659581551295285211137817532755868030711396952823653107240937874294728461212801900537847299277238897312091949305632982483424818113172877411705051021557104426193442321<228>] |