269

This number is a prime.

The longest official game of chess on record (269 moves) took place in Yugoslavia on 2/17/89 and ended in a draw. Note that 2, 17, 89, and 269 are all prime numbers.

The Electoral College vote for President of the United States could end in a 269-269 vote tie. The race would then go to the House of Representatives where each state delegation would get one vote. [Patterson]

The smallest odd prime number formed from the initial digits in the decimal expansion of sum of alternating series of reciprocals of primes, i.e., 1/2 - 1/3 + 1/5 - 1/7 + 1/11 - ... = 0.269... . [Beedassy]

On the SEPTA commuter rail system that serves Philadelphia, car 269 was the only one that still showed the name of the predecessor Pennsylvania Railroad (as of 2009). [Litman]

The 269th day of a non-leap year is 26 September (26/9). [Meller]

The smallest prime whose the square, 72361, is a concatenation of primes in two ways, i.e., (7, 23, 61) and (7, 2, 3, 61). [Loungrides]

The prime price in dollars that Patrick Vennebush saw on a store window sign the other day.

The decimal expansion of pri = 0.269606... begins with the 4th and last "Number of the Horsemen" (269). Unsurprisingly, the next three digits (606) reminds one of the biblical Kingdom of GOG (rotating 909 ≈ gog), which refers to a prophesied invader of Israel often associated with end-times events and New World Order. What would Sir Isaac Newton have said about it? [Leonardis]

269 is the last prime number in the first set of four consecutive primes with common difference of six: {2516️⃣2576️⃣2636️⃣269}. Recall the Four Horsemen of the Apocalypse? [Silva]

Germain anatomist Heinrich Wilhelm Gottfried von Waldeyer-Hartz published 269 papers throughout his career, spanning a range of topics from gross anatomy, histology, physiology, pathology, anthropology, education, history to the arts. [Elsevier]

The prime number of puzzles in "Cryptograms" by Kim Steele.