Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 820: | \[{4^{820}-1\over3}\] | 52 × 11 × 17 × 31 × 412 × 83 × 821 × 10169 × 13121 × 13367 × 61681 × 141041 × 181549 × 2940521 × 12112549 × 43249589 × 164511353 × 269896441 × 8562191377<10> × 8831418697<10> × 11109333761<11> × 70171342151<11> × 61213422340181<14> × 82777720757144341<17> × 758399801407611361<18> × 210085224303959163308751601<27> × 3655725065508797181674078959681<31> × 12243864122465612155106392056552353<35> × 76401557052661070266405340180269721<35> × 2125820563389437533390243893834597846757304863651<49> × 3017866802599074997815107329034839893699457097851521650341414241<64> × 4879741092114972073978180041577182966084696612203787850124769118520779475107029347607761<88> |