Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 669: | \[{4^{669}-1\over3}\] | 3 × 7 × 18287 × 196687 × 247531 × 1466449 × 2916841 × 219256122131<12> × 1469495262398780123809<22> × 4340301546362831119363<22> × 182224921317852297530287<24> × 596242599987116128415063<24> × 20493495920905043950407650450918171260318303154708405513<56> × 56377694445208154141927654613855613062927113955212040908548454699046039020893338370875013074480485757794923<107> × 142453214851009124378099897532172312583433956914474541632456432848048989381236579920379218575796308080313112697<111> |