Primes through the lens of analysis: Dirichlet series and Euler products, the Riemann zeta function, the prime number theorem, Chebyshev bounds, Mertens' theorems, L-functions, sieves, and summation techniques.
Free to start · adaptive placement finds your level · reviews timed so it stays learned.
Every idea is taught with motivation and a worked example before the drills, and an FSRS spaced-repetition engine schedules each review for the moment just before you'd forget it. A short placement check finds what you already know, so you start Analytic Number Theory exactly where it's useful.