Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 279: | \[{15^{279}-1\over14}\] | 241 × 311 × 541 × 3907 × 16741 × 21061 × 49663 × 660603097954354915026956925328631<33> × 54121063424341253194170305920478143<35> × 34327408553153235877683920788486912324029949838354936279201903283843361<71> × 282666181122365321800948478238350737044801552245890801008799594459033093819595357615249503338564056899411141811373473401046595374693685945962602603560439801873544047<165> |