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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 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 formed from the initial digits in the decimal expansion of sum of alternating series of reciprocals of primes. [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.

(There are 5 curios for this number that have not yet been approved by an editor.)




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