Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 355: | \[{20^{355}-1\over19}\] | 11 × 61 × 251 × 49437301 × 95293361 × 9199855531<10> × 201161092255316201234202042361<30> × 5123230489810588464101325406922145057372047234373919061041<58> × 61777752739108975259079961779208763786873373427879250247440461<62> × 1000330159925461842405415522457100658081649081121967294265559012063370581921523201750234165408580021<100> × 83087724286626762822413257349658574910508256345920959525276703680445455312081073025335320418343301002131813386072131147540983606557377049231534632441132637853949329359165424739195231<182> |