For how many prime pairs (p, q) does there exist an integer…

For how many prime pairs (p, q) does there exist an integer n such that (p2 + 1)*(q2 + 1) = n2 + 1 ?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #16076

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