Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 138: | \[{19^{138}-1\over18}\] | 22 × 3 × 5 × 73 × 47 × 127 × 139 × 277 × 691 × 2347 × 2531 × 5521 × 1530559 × 9555459481<10> × 16497763013<11> × 34409530237<11> × 1335495402823<13> × 71425475193776503<17> × 1552450817964462079<19> × 156832034288392140949<21> × 4727618051656780294153<22> × 167026691666949955561753<24> |