Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
515: | \[{3^{515}-1\over2}\] | 112 × 1031 × 13904017381<11> × 6957596529882152968992225251835887181478451547013<49> × 81390061154901040915047190963509493467072953179621<50> × 265583586915553954689927748193653317513152426592838510814462459025354527744076607109173885844248007550245844534973452272001013120031<132> |