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On a conjectural congruence of Guo
Published 23 Jan 2020 in math.NT | (2001.08347v1)
Abstract: Let $p\equiv3\pmod{4}$ be a prime and $r$ a positive integer. We show that $$ \prod_{k=1}{(p{2r}-1)/2}\frac{4k-1}{4k+1}\equiv1\pmod{p2}. $$ This confirms a recent conjecture of Guo.
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