Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 290: | \[{7^{290}-1\over6}\] | 23 × 11 × 59 × 191 × 2801 × 4899841 × 127540261 × 227327521 × 71316922984999<14> × 402488219476647465854701<24> × 277463632645667965008782910911<30> × 28227438998743999270303330624662217730888039289619786090751<59> × 225058061203225404048432655287882105672359391493182864666093306256896642098735173627681<87> |