Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
46: | \[{19^{46}-1\over18}\] | 22 × 5 × 47 × 277 × 691 × 2347 × 2531 × 16497763013<11> × 1335495402823<13> × 156832034288392140949<21> |