Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 268: | \[{3^{268}-1\over2}\] | 23 × 5 × 269 × 1609 × 1877 × 11257 × 221101 × 5390821 × 50546266229<11> × 441019876741<12> × 475384700124973<15> × 719571227339189<15> × 2583985068397606535128513<25> × 4299412981246169975118907<25> |