Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 108: | \[{3^{108}-1\over2}\] | 23 × 5 × 7 × 13 × 19 × 37 × 73 × 109 × 433 × 757 × 8209 × 19441 × 19927 × 530713 × 150094634909578633<18> |