Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
66: | \[{19^{66}-1\over18}\] | 22 × 3 × 5 × 73 × 23 × 67 × 127 × 859 × 2113 × 104281 × 489061 × 519553 × 34451077 × 62060021 × 181258778383<12> × 253239693257<12> × 7302593769703<13> |