Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
194: | \[{7^{194}-1\over6}\] | 23 × 389 × 971 × 599599487 × 146533138940077<15> × 13415991946479937907161852774776273092954672228563925519099<59> × 4160924156784953821413999107825795646911807584554735726748631757909547764679<76> |