Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
77: | \[{22^{77}-1\over21}\] | 7 × 67 × 353 × 16968421 × 61303243 × 1176469537 × 6294765596659<13> × 868349285220418699859316590919190638269067911418676413837787<60> |