Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 815: | \[{4^{815}-1\over3}\] | 11 × 31 × 6521 × 11411 × 148331 × 150287 × 704161 × 110211473 × 11281292593<11> × 27669118297<11> × 1023398150341859<16> × 36230454570129675721<20> × 337570547050390415041769<24> × 180883807440027655212532885072379634915469957001205875201<57> × 6309875796859222682628258124466792652955476368011894066158361980151<67> × 528171517455534029210127386106091229808271807534977151762112880888333401<72> × 153919859254539507903888291220522793267895167994955065764328888096002594351378673515961515690446255239502568695025950804065176258892972969957340201505558967880076804581992398102614571<183> |