Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 343: | \[{4^{343}-1\over3}\] | 43 × 127 × 6073159 × 1428389887 × 2513690593 × 62228099977<11> × 4363953127297<13> × 4432676798593<13> × 2883580030222424891<19> × 4391115859495019452210297067047180796674861654177048737558611<61> × 58961804474844164724814095915114338093146118248375213688557057<62> |