POJ-3006(Dirichlet's Theorem on Arithmetic Progre)
DescriptionIf a and d arerelativelyprimepositiveintegers,thearithmeticsequencebeginningwith a andincreasingby d,i.e., a, a + d, a +2d, a +3d, a +4d,...,containsinfinitelymanyprimenumbers.Thisfactiskno