Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
109: | \[{19^{109}-1\over18}\] | 177889 × 256380863 × 1551391769 × 737917509151133574154027<24> × 6504935099394014405909146312394647<34> × 3961530772257172751242715595128137716110841782476968116923<58> |