>>> import random
>>> integers = [random.randint(1, 3000) for _ in range(10**3)]
>>> a = set(integers)
>>> a
{1, 2053, 2054, 7, 2056, 2061, 15, 2065, 2068, 21, 2070, 20, 2072, 2073, 22, 30, 34, 35, 2084, 2082, 36, 39, 43, 44, 50, 52, 2101, 58, 2107, 62, 2110, 64, 68, 2117, 72, 74, 76, 77, 80, 2130, 2131, 84, 85, 2135, 2140, 93, 100, 2148, 2150, 101, 106, 2156, 109, 115, 2167, 121, 122, 123, 2171, 2169, 127, 128, 2177, 130, 129, 2179, 2178, 132, 135, 2184, 136, 2187, 144, 2193, 147, 2197, 2198, 151, 149, 2201, 153, 2202, 159, 160, 162, 2213, 2215, 172, 2224, 178, 179, 2228, 2231, 184, 185, 2234, 2233, 190, 191, 2244, 196, 2246, 199, 2248, 2245, 202, 2251, 205, 206, 2255, 2256, 2259, 213, 2265, 2267, 219, 221, 222, 220, 224, 2271, 2269, 227, 2276, 229, 2278, 2280, 2281, 2282, 238, 239, 241, 244, 2292, 2295, 248, 2297, 2300, 2301, 255, 2304, 2305, 2306, 260, 2310, 264, 265, 2314, 2315, 269, 272, 2321, 276, 2326, 278, 285, 2334, 287, 289,