Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 205: | \[{31^{205}-1\over30}\] | 5 × 11 × 83 × 1231 × 17351 × 290640549491<12> × 42481797154433176612759<23> × 1253725733881088547496327299500911<34> × 132259604354473376342663326676479453<36> × [89498094818443332011279911968509504301367290454884678645914989608643558605640740387221650827168607388677609262968496817912295584626412742178569859899013036786311242187882385634236914734683771<191>] |