What is the greatest prime factor of (10!9!) + (10!11!)

What is the greatest prime factor of (10!9!) + (10!11!)?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

~8 minAnswer checked instantly

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #11488

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