Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
211: | \[{15^{211}-1\over14}\] | 51907 × 1348477930455949<16> × 407829789814479865307270476681625284811512890727582217<54> × 141604230482886778703231027415837132352587313546826597728262255480689<69> × 2526403294221866821610761507018065331479014733099916932656452626827884680501178869942593932428860783157599<106> |