Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
152: | \[{7^{152}-1\over6}\] | 25 × 52 × 419 × 1201 × 351121 × 44118001 × 700197881 × 4058036683 × 1295161807633<13> × 4534166740403<13> × 1299254811081649<16> × 135214434686939513<18> × 2598696228942460402343442913969<31> |