Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 388: | \[{19^{388}-1\over18}\] | 23 × 5 × 181 × 389 × 8014529 × 350286401 × 80763918647<11> × 1044377067137<13> × 746630845953751433<18> × 63114152631362881733<20> × 11542175764721536214759<23> × 2406871247546906126235451908529<31> × 62468771853453988907994855172682616050526469382576404972295431<62> × 2786512868582843530781142485299022080192976915297814970303214458517254691<73> × 5240385768596582879602516744745474860062805599742948759581326354226071346185499851996744133912810592360358298492529466577570483769275512827704387987068426261450444940413201164981310426914557440425643072618365743240439182185357<226> |