Base 32 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 221: | \[{32^{221}-1\over31}\] | 1327 × 8191 × 131071 × 7555991 × 145295143558111<15> × 115812024214750631<18> × 9520972806333758431<19> × 155137816977180947152785562601502526330318743274151<51> × 2365454398418399772605086209214363458552839866247069233<55> × 36623786615448792528228651753874770336757984952740798581899844047499677232721<77> × 604917355122297256408243633492781887181892523909681942196638806895777053380473721<81> |