Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
505: | \[{3^{505}-1\over2}\] | 112 × 205031 × 33034273 × 465092326319<12> × 3732938536661701<16> × 50316775668019759306202964023<29> × 276878587446880592989075966008807841<36> × 222864962480066280616666395914340804119812069111241951551148176794907599760996542539686082738105614139306146302798900746224175257953131<135> |