''There are infinitely many [[prime number]]s in an [[arithmetic progression]] of the form an + b if a and b are relatively prime (i.e., (a, b) = 1)).''
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''There are infinitely many [[prime number]]s in an [[arithmetic progression]] of the form a<sub>n</sub> + b if a and b are relatively prime (i.e., (a, b) = 1)).''