# Ramanujan constant

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The Ramanujan constant is an extremely close almost-integer, equal to $$e^{\pi\sqrt{163}} \approx 262537412640768743.9999999999992500725971981$$.[1] It came from an April fool's prank by Martin Gardner, where he claimed that $$e^{\pi\sqrt{163}}$$ was actually an integer and that Ramanujan himself hypothesized this. Ramanujan had no actual involvement with the number.

The number is not at all a coincidence; $$-163$$ is a Heegner number and $$e^\pi$$ has important properties on the complex plane.

### Sources Edit

1. Ramanujan Constant