Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
245: | \[{3^{245}-1\over2}\] | 112 × 71 × 491 × 1093 × 4019 × 8233 × 32341 × 51157 × 131713 × 2664097031 × 4430152977536859072181134657493233649089245714747389001639572141363110009421<76> |