Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 544: | \[{20^{544}-1\over19}\] | 3 × 7 × 172 × 97 × 137 × 401 × 2857 × 3673 × 160001 × 2567783 × 2640509 × 92054423 × 557334529 × 1505882353 × 629433157137881<15> × 230734661278799273<18> × 6756288659793814433<19> × 689852631578947368421<21> × 680653156857066936553996121<27> × 2878870785836948026295038313<28> × 193165810175918904613943865257<30> × 3591489271983870628601405222047564281012937357772650316445012491336897793910054817146234587702742251081823013145390528774349629799609949312315398476125679857<157> × [1157920892373161954233943003022100694203119245150329436942727818770002986101290652132003779623258528668011468842127596239215070390560718389527564895033934450699573417823739724043732340365869537774591472869314774264870313304337593423057754038537082529566867440737095516159718525023289344000000429496729599999999999344640000000000000001<334>] |