Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 398: | \[{7^{398}-1\over6}\] | 23 × 3583 × 4588543 × 34266607 × 214661295139431885643832154153997<33> × 86539116653269014086961051020627012232284504261471<50> × 3742361194240057893199566966355314018920268076528360256893169784289227626965547117<82> × 1188157643536311511608900188498104263170678136736371432669534890063484994680722868288861255831182057431802975257340612015708984828478898969687279497327343<154> |