Let $p > 2$ be a prime number. If two integers $n,m\in\mathbb Z$ belong to the same congruence classes modulo $p$ then their Legendre symbols modulo $p$ are equal, formally $$n(p)\equiv m(p)\Longrightarrow \left(\frac np\right)=\left(\frac {m}p\right).$$

| | | | | created: 2019-05-12 18:50:27 | modified: 2019-05-12 18:53:07 | by: *bookofproofs* | references: [1272]

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[1272] **Landau, Edmund**: “Vorlesungen über Zahlentheorie, Aus der Elementaren Zahlentheorie”, S. Hirzel, Leipzig, 1927