3 ms·2 * 2 * 191 * 383 Which is mildly interesting.by akira2501 3y ago2 * 2 * 191 * 383 Which is mildly interesting.w-m 3y agoNeat indeed. 3 * 2 ^ {0, 0, 6, 7} - 1 And all of them are palindromes.jwilk 3y agoFor people confused by the above notation: 2 = 3 × 2⁰ − 1 191 = 3 × 2⁶ − 1 383 = 3 × 2⁷ − 1