Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 977: | \[{4^{977}-1\over3}\] | 7817 × 728843 × 867577 × 1813313 × 7128193 × 2069655374719577273<19> × 9524716048809932689<19> × 49858990580788843054012690078841<32> × 23830405750609887318420248635858165476368020607396633699141951<62> × 330180943467844815199525008542209334406307908016484842019975953548042251864897428955193192919262272255342601623890982717534432034376180217147363365794154372260598971057497<171> × 1100725233819588952266205338727099198718536601759682685867540804279883280973321950759582581363939239987131086596527850886746797657721799270450552640676259563923560134734144011395269818112836382298703085324675268751912620892132811329260281091087275957238717193<259> |