Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 154: | \[{3^{154}-1\over2}\] | 22 × 23 × 67 × 547 × 661 × 1093 × 3851 × 51457561 × 7151459701<10> × 76831835389<11> × 56495392933101222275861053369<29> |