Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 561: | \[{3^{561}-1\over2}\] | 13 × 23 × 1871 × 3851 × 6359 × 12853 × 34511 × 2413941289 × 99810171997<11> × 1272753542934479<16> × 3411926755457243<16> × 462734945368154372497<21> × 527447346649058852221083363397206345775307<42> × 1489935952404989459968068825521609894077867146671403467690280373477075983175560807485374020289631014064618157400542172265134381385713<133> |