Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 680: | \[{3^{680}-1\over2}\] | 24 × 52 × 112 × 41 × 61 × 103 × 137 × 307 × 1021 × 1181 × 1531 × 1871 × 34511 × 224401 × 956353 × 7674481 × 42521761 × 1743831169 × 2663568851051<13> × 6458150122561<13> × 3833564416504313<16> × 862970652262943171<18> × 13271362257832586268931<23> × 1706953634650967930299490233845839250457448201276787601<55> × 140724606069836479442888585534686916774710037475613058034168159719945019951882284046299261301882317499732254225216840194561<123> |