Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 109: | \[{15^{109}-1\over14}\] | 1091 × 13314787 × 12210400864955756334357543791<29> × 7214058133190348510797044416367276209047<40> × 8724703319150532263995205786459299524404002914049<49> |