Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 482: | \[{4^{482}-1\over3}\] | 5 × 2411 × 2640397 × 15594629 × 22000409 × 10411181203<11> × 76119208744309<14> × 15059828108442641<17> × 3115949925222900514664736941746248477210667<43> × 225486428396474227112409054380791819318562873<45> × 160619474372352289412737508720216839225805656328990879953332340439<66> × 3533694129556768659166595001485837028996511802181406170435598282024550401<73> |