Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 286: | \[{7^{286}-1\over6}\] | 23 × 23 × 53 × 1123 × 108109 × 145861 × 293459 × 10746341 × 228511817 × 16148168401<11> × 2547984152429<13> × 36383445305923<14> × 528808508322667<15> × 376215890379315997311416372784691746214777<42> × 1111942789781566781299747693078700888402223739<46> × 201769337115341310511017288407253154709282010025100912553600133847<66> |