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TIL In the 1980s Ronald Graham offered a $100 prize for the solution to the Boolean Pythagorean triples problem. The $100 was awarded to Marijn Heule in 2018.

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a8E1L TIL that philanthropist and engineer Avery Fisher was motivated to start his own company after, identifying a way to save his employer $10,000 a year, was immediately denied a $5/week raise.
QNpd TIL In 1955 the US had a mach capable strategic bomber that could takeoff and land on water
gYaL TIL American roulette wheels are different than wheels in other parts of the world. Casinos in the U.S. use a 0 and double 0 to decrease the odds of winning to 1/38, while other countries use just 0, making the odds 1/37 when betting individual numbers
v1Vr7 TIL about Vincent van Gogh's death. He shot himself in the chest, missing vital organs, dying 30 hours later in a hospital with his brother Theo at his side, his last words having been "The sadness will last forever".
a84Lb TIL that you can tell a casino to never let you back in, and they won't. But you had better mean it, because if you do return you will be immediately removed, charged with criminal trespass, fined up to $1000, and if you had any winnings, they'll confiscate it.