Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 297: | \[{20^{297}-1\over19}\] | 199 × 421 × 661 × 859 × 56431 × 2355211 × 64008001 × 879338701 × 10778947368421<14> × 298114935351301<15> × 175462044485240500219<21> × 12992593428389191667383293584162419<35> × 445857960156220211502282409711073343103021<42> × [11530593243662155843190161040849760694985175768652652916729032170587473704336590930036361203265957189809429094921815334007217124832951314866522231187924631163769092776009775799068755522248443002993871916867396957467316827661<224>] |