Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 226: | \[{3^{226}-1\over2}\] | 22 × 227 × 1583 × 362053 × 2172539 × 156472231 × 3626038130651680583578933430931295416667<40> × 526256453012063980796131127321354599535039<42> |