Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 622: | \[{4^{622}-1\over3}\] | 5 × 6221 × 21149 × 64067 × 5344847 × 8892992859964273<16> × 2502960808606492609801<22> × 2647649373910205158468946067671<31> × 37484925674676522123498017785964330969518239484995740789<56> × 294803681348959296477194164064643062187559537539328375831<57> × 31708712839380693639084162903122131487175778757880224663030412281476609697721592057097<86> × 21705660634091537009057064062426347801694097690583490415257025927428956675122988820368249<89> |