Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 113: | \[{15^{113}-1\over14}\] | 367508084381203624767165304975303<33> × 1537861910551454633243525748690200935714296300623626089102209700603649882470566978076369406450205047<100> |