Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 209: | \[{19^{209}-1\over18}\] | 104281 × 62060021 × 414945257 × 17721320436288806332909<23> × 109912203092239643840221<24> × 324833788823890128092040287671403205841<39> × 595611688132500814745279702913337183912168625795639100358739982279311677<72> × 99782822167246176683664033812199313416011940156917002173987855283328332220517536370175961<89> |