Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 203: | \[{7^{203}-1\over6}\] | 292 × 59 × 4733 × 60089 × 127540261 × 71316922984999<14> × 145916619612283783386370190568409<33> × 1158560595990812530792619356788467777477674946730941<52> × 27561825077977067991406396148381239250505396358671209<53> |