Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 429: | \[{21^{429}-1\over20}\] | 67 × 79 × 463 × 547 × 1171 × 189437 × 516094151 × 197647219771<12> × 17513875027111<14> × 3955202198062795629622003<25> × 80459337199345300130638393<26> × 713255542756934588000409316079479675200443737<45> × 3133215050775538159999253890862035621216929079706901880925831712192141277620814505531687549750066100763<103> × [225825581748668828222399395276996702618220653219292849606517150317490246316293251219650818828304394139836374982895053694538453382902088077195570916454521851091667425152853979933472825591853992259237192157725403948372596764157244080152928478876078766095660190703074512562245489376499261755127135069464752040600331306401<318>] |