+312 off-topic
+30 +30 off-topic
+9673 Mar 25, 2017
For given positive integers a,b,c consider the set S = {a + bk + cn : k = 0, 1, 2,...,n = 0, 1, 2,...}. Characterize all triples a,b,c when S contains infinitely many primes.
+302 +302
1 Online Users