Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 663: | \[{8^{663}-1\over7}\] | 73 × 79 × 103 × 919 × 937 × 1327 × 2143 × 6553 × 8191 × 11119 × 47737 × 86113 × 121369 × 131071 × 336089287 × 7830118297<10> × 15378736087926199<17> × 75582488424179347083438319<26> × 1817023253798585112376955621635919346759818823715057<52> × 2365454398418399772605086209214363458552839866247069233<55> × 794848656730261183699896604513541946085000444947963571261039<60> × [13499652135034924746343560166578176771616113206032645575639749965310912359162093321332668325102313834110161431557595006135521503336090670084854160341707232545194665186883917065923311225098746100964954574536427560287471393614498143176615160312863370620269206398143933647428057055284326574429014452555100368094142652941899017<323>] |