How to find the Dirichlet density of the set of primes which are congruent to 2 mod 3 and 5 mod 7
And the set of primes which congruent to 1 mod 9 but not to 1 mod 27 I can't understand the processes of evaluating this using slur function?
2026-03-30 12:59:00.1774875540
Dirichlet density of set of primes
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The Dirichlet density of primes congruent to $a$ modulo $m$ is $\frac{1}{\phi(m)}$ for $\gcd(a,m)=1$.
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Dirichlet density of $p \equiv 1 \bmod 8$