Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 450: | \[{31^{450}-1\over30}\] | 25 × 32 × 52 × 72 × 11 × 19 × 41 × 101 × 151 × 271 × 331 × 577 × 1901 × 2521 × 3637 × 4951 × 8101 × 11701 × 17351 × 21001 × 21821 × 43201 × 63901 × 81343 × 106291 × 214651 × 1538083 × 2065411 × 4726301 × 13277801 × 327412201 × 880374069121<12> × 20235942281002951<17> × 997936488044528101<18> × 74770514303869505101<20> × 337048683633480845467801<24> × 300392264044249601502733598251<30> × 2994938361626916310097900969699892125851<40> × 100114014709900409694207758978066381032100274063451<51> × 2064255287371978418499841280594690845729046406705514947248358751<64> × 469762389425860566339831150377891857160104326935768573018867997170753288712894089692091883354002754486543751<108> × [2127695427670444088537004203244909975911333901048241363680065268947211492819305555081246042799237087798193260932900582146821926830680803009833589390905740220396239673552881601<175>] |