Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 286: | \[{15^{286}-1\over14}\] | 24 × 23 × 53 × 67 × 79 × 463 × 2333 × 8537 × 157483 × 197341 × 16655159 × 23504771357<11> × 1539711288259<13> × 2007493022532713<16> × 3524961678490054751521<22> × 26371927300888660485437098288790424815083214113007<50> × 27238544421570165221609562106544163211671989283523240902130538413401353484151<77> × 1813911686180774495600290811009246259606407211382731743638341671651483135886772227880267502752462144042478749031701<115> |