Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 874: | \[{4^{874}-1\over3}\] | 5 × 47 × 229 × 277 × 457 × 1013 × 1657 × 7867 × 30269 × 174763 × 178481 × 524287 × 525313 × 2796203 × 3198841 × 5579617 × 35591029 × 2968523521 × 325096053553<12> × 6203145044672921<16> × 668214452631436913<18> × 315929758125865060721<21> × 1905976815426273605733466333451<31> × 45818248313249905332864319777281951332281<41> × 76477819765444619368130651164956718316971995659<47> × 16645337061331980278552507532516663483336384101293064527297861<62> × 728853407707467208421993458966504139019157860437186335406130262344738292438484569798131887<90> × 1242918828844873812911901981613600813540994700977415372594292457823518264146350640662974065115123273441335573<109> |