Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 294: | \[{21^{294}-1\over20}\] | 2 × 11 × 43 × 337 × 421 × 463 × 631 × 3319 × 3529 × 4789 × 6427 × 7057 × 17053 × 1287133 × 1519099 × 81867661 × 227633407 × 640361401 × 1606344741163<13> × 1767442850839<13> × 2524084462789<13> × 22864311556633<14> × 266450990381897623<18> × 86494371600108393937<20> × 156357474589352978545297<24> × 1703751007820049542146461103<28> × 7511823115405357369289846817961357<34> × 17460141974669146302241107654783887359178281<44> × 515636858029717455435439909557089458097612182207504847932492204970477581602495110453413756809328729<99> |