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15-5-15 Is this an auspicious day?


Posted by Old Man Time on May 15, 2015 at 12:23:00:

Friday 15-5-15 and it's day 135 with 230 days to go to the end of year. Nothing much happening. Just an excuse to post on 15-5-15. The Microsoft day number for today is a boring 42139 until you notice that it's a prime number! That gets me wondering how many dates around now are prime numbers - they're supposed to be rare enough? There are two prime number dates this May - today and the 7th. There are 36 prime number days in 2015 so it's a one in 10 chance of today's date being a prime number.

42013 09/01/2015
42017 13/01/2015
42019 15/01/2015
42023 19/01/2015
42043 08/02/2015
42061 26/02/2015
42071 08/03/2015
42073 10/03/2015
42083 20/03/2015
42089 26/03/2015
42101 07/04/2015
42131 07/05/2015
42139 15/05/2015
42157 02/06/2015
42169 14/06/2015
42179 24/06/2015
42181 26/06/2015
42187 02/07/2015
42193 08/07/2015
42197 12/07/2015
42209 24/07/2015
42221 05/08/2015
42223 07/08/2015
42227 11/08/2015
42239 23/08/2015
42257 10/09/2015
42281 04/10/2015
42283 06/10/2015
42293 16/10/2015
42299 22/10/2015
42307 30/10/2015
42323 15/11/2015
42331 23/11/2015
42337 29/11/2015
42349 11/12/2015
42359 21/12/2015

Now where's that chicken with the entrails to check out what the weather will be like on All-Ireland day and whether Mayo will bring Sam home? Unfortunately 20 September next is not a prime number day on the Microsoft calendar at least. Maybe on the Mayan one....

 
 
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