X+n is prime for the following n. Find X. 1042011859 994102341 775679481 1381000923 1058901679 1806712779 1024661877 1604156167 630497697 2084451999 450191841 862100841 1532986981 1148778471 1389130483 1968136723 1840788079 1935380863 2105386093 1410157897 685875609 313635559 1256294407 1765630621
In general, how difficult is this problem? What if addition were replaced by XOR?
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