Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 851: | \[{4^{851}-1\over3}\] | 47 × 223 × 1777 × 178481 × 542939 × 2796203 × 25781083 × 616318177 × 12985283780501700403<20> × 1530328553290391228929969<25> × 11862938913865507127049391<26> × 604367679922143570622653720534643264325088703722918681771377012408526538323960466739317375681<93> × 9169466285112385145786919034786866010313540919125471575107378058834025916913248388550311330518963212204000020093390193123<121> × 717380630460226230305860936849190480084224719404904576848566002303176824107337578481502878716197281526142915571451045986237554671234201774006774449712687051888722024398492314919663183687169<189> |