Base 14 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 221: | \[{14^{221}-1\over13}\] | 13 × 103 × 157 × 443 × 174149 × 140099857 × 29914249171<11> × 1906367884747<13> × 22771730193675277<17> × 735533553254230437171475366877<30> × 63983964397426903336323222029379775642737174373<47> × 42699857343375875563075862847459098680152945035657393<53> × 255463579013481233768309614877675390722960071384776701112299279<63> |