Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
78: | \[{22^{78}-1\over21}\] | 3 × 133 × 23 × 79 × 463 × 2003 × 1283881 × 1421317 × 21821513533<11> × 85107437663<11> × 6165936796469347<16> × 12296089473177511<17> × 8537828742536325458236531<25> |