Some facts on the number 29, taken from https://en.wikipedia.org/wiki/29_(number)
- 29 is the tenth prime number, and the fifth primorial prime.
- 29 forms a twin prime pair with thirty-one, which is also a primorial prime. Twenty-nine is also the sixth Sophie Germain prime.[1]
- 29 is the sum of three consecutive squares, 22 + 32 + 42.
- 29 is a Lucas prime,[2] a Pell prime,[3] and a tetranacci number.[4]
- 29 is an Eisenstein prime with no imaginary part and real part of the form 3n − 1. 29 is also the 10th supersingular prime.[5]
- None of the first 29 natural numbers have more than two different prime factors. This is the longest such consecutive sequence.
- 29 is a Markov number, appearing in the solutions to x2 + y2 + z2 = 3xyz: {2, 5, 29}, {2, 29, 169}, {5, 29, 433}, {29, 169, 14701}, etc.
- 29 is a Perrin number, preceded in the sequence by 12, 17, 22.[6]
- 29 is the smallest positive whole number that cannot be made from the numbers {1, 2, 3, 4}, using each exactly once and using only addition, subtraction, multiplication, and division.[7]
- 29 is the number of pentacubes if reflections are considered distinct.
Some facts on the day February 29th, taken from https://en.wikipedia.org/wiki/February_29
February 29 is a leap day (or "leap year day"), an intercalary date added periodically to create leap years in the Julian and Gregorian calendars. It is the 60th day of a leap year in both calendars, and 306 days remain until the end of the leap year. It is also the last day of February in leap years with the exception of 1712 in Sweden. It is also the last day of meteorological winter in the Northern Hemisphere and the last day of meteorological summer in the Southern Hemisphere in leap years.
In the Gregorian calendar (the standard civil calendar used in most of the world), February 29 is added in each year that is an integer multiple of four (except for years evenly divisible by 100, but not by 400).[1] The Julian calendar — since 1923 a liturgical calendar — has a February 29 every fourth year without exception. (Consequently, February 29 in the Julian calendar falls 13 days later than February 29 in the Gregorian, until the year 2100.)
Some facts you will want for attending the event, taken from a discussion between EchelonKS and scouterwooby:
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we will be picking up a box of timbits, but anything else is on your own dime
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you only need to show up to claim the event
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you do not need to sign a logbook, but if you insist, one of us will have the back of a receipt you can sign
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this is just a coffee social to catch up with everyone and look to the caching season ahead
- no mathematical knowledge or skill is required at this event
