Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 222: | \[{28^{222}-1\over27}\] | 3 × 29 × 149 × 223 × 271 × 757 × 1481 × 1999 × 6661 × 15319 × 20129 × 1072039 × 1883671 × 36129368689<11> × 57930214687<11> × 1004690609843<13> × 5478984908421979<16> × 1089656681875662196152019<25> × 362872981217703889717460874623<30> × 9326836611649785960038304217039<31> × 20716530271154998370621650655677<32> × 12034188740195053379860324023109474023287<41> × 892190545523723188553274916000742618629671530524374780485069957246360089<72> |