Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 106: | \[{19^{106}-1\over18}\] | 22 × 5 × 107 × 104095533511<12> × 323930821687153<15> × 2551089855701675251204783<25> × 37334173314913678536474517<26> × 210146007928707977384770009<27> × 135818088892456368195992838307<30> |