Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 381: | \[{3^{381}-1\over2}\] | 13 × 5843 × 597409 × 681229 × 21520151 × 76082653 × 2896724388952980361<19> × 301515315752300874236564235591357673<36> × 686556699831009964827250042867748094406096323373530163920816265103091925457524336286558608540561<96> |