Math

“Kryptos has not been solved,” said artist Jim Sanborn after releasing his parting clues to the “K4” section of his sculpture puzzle

For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years later

Researchers spot the “tipping point” before mathematicians’ moments of discovery

What would the world look like if we changed the value of pi? Whether in the real world or a game environment, the answer is complex

The noperthedron has a surprising property—which disproves a long-standing conjecture

Uncovering the CIA’s Kryptos puzzle took three parts math and one part sleuthing

In certain circumstances, losses create a sure path to victory, an idea with implications for biology and cancer therapy

Decode a confusing clock in this math puzzle

A decades-old technique from network science saw something in the papal conclave that AI missed

Mathematicians have found a new way to predict how prime numbers behave

Learn the fundamentals of the burgeoning field of knot theory while solving some puzzles along the way

Is it really possible that half of all people who have ever been age 65 or older are still alive today? We explore the amazing mathematics of demography to find out