Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 194: | \[{19^{194}-1\over18}\] | 22 × 5 × 389 × 8014529 × 350286401 × 80763918647<11> × 1044377067137<13> × 746630845953751433<18> × 11542175764721536214759<23> × 2406871247546906126235451908529<31> × 62468771853453988907994855172682616050526469382576404972295431<62> × 2786512868582843530781142485299022080192976915297814970303214458517254691<73> |