3Blue1Brown’s most viewed videos of 2019
Lifetime totals, not views in this range.
Snapshot from 19 Oct 2026.
- Rank 1:

But what is a Fourier series? From heat flow to drawing with circles | DE4
- Rank 2:

The most unexpected answer to a counting puzzle
- Rank 3:

Why do prime numbers make these spirals? | Dirichlet’s theorem and pi approximations
- Rank 4:

Differential equations, a tourist's guide | DE1
- Rank 5:

Bayes theorem, the geometry of changing beliefs
- Rank 6:

The unexpectedly hard windmill question (2011 IMO, P2)
- Rank 7:

e^(iπ) in 3.14 minutes, using dynamics | DE5
- Rank 8:

But what is a partial differential equation? | DE2
- Rank 9:

Solving the heat equation | DE3
- Rank 10:

Cramer's rule, explained geometrically | Chapter 12, Essence of linear algebra
- Rank 11:

How colliding blocks act like a beam of light...to compute pi.
- Rank 12:

Pure Fourier series animation montage
- Rank 13:

The quick proof of Bayes' theorem
- Rank 14:

Q&A with Grant, windy walk edition