Question:
My birthdate is totally prime numbers, does that make me special?
Atomin
2006-04-21 03:18:46 UTC
The year - 1957 (yes I'm that old) :)
The month - July - i.e. 7
The day - 23

In fact I can't remember of anyone I know who is born on a totally prime date. (Of course this question is more of a trivia than a math question! But I like this section better!))
Twenty answers:
Mark P
2006-04-21 04:40:08 UTC
There's a mistake in your question. But I'm going to write this assuming your question is correct. See the very end of my answer for an important point.



Whether you're "special" depends on your definition of special, I guess. It does put you in a fairly rare class of dates.



Let's look at the likelihood of having a birthdate that matches your conditions.



1) The year of your birth is a prime number.

2) The month of your birth is a prime number.

3) The day-of-the-month of your birth is a prime number.



In the past 100 years, there were only 13 years that were prime: 1907, 1913, 1931, 1933, 1949, 1951, 1973, 1979, 1987, 1993, 1997, 1999, and 2003.



In any given year, there are only five months that are prime: 2, 3, 5, 7, and 11.



And in a given month, there are only eleven possible days that are prime, though not all of these occur in every month: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, and 31.



Let's calculate how many total days there were in the past 100 years, and how many of those dates meet your criteria.



First, we'll calculate the total number of days in the past 100 years, ignoring leap years (we'll add those in later). Every year has 365 days, so 365 times 100 equals 36,500.



Now, let's add in the leap years. Leap years come every 4 years, except that if a year is divisible by 100, it's not a leap year. Except if it's divisble by 400, it is a leap year. The only "exceptional" year in the past 100 years is the year 2000, and that's divisible by 400, so it was a leap year. So there were twenty-five leap years over the past 100 years (the period from April 22, 1906 through April 21, 2006).



So the total number of days in the past 100 years is 36,525.



Now, how many of those dates fit your criteria?



In a non-leap year, there are 52 dates that fit your criteria. All leap years are divisible by four, and thus they are not prime numbers, so we can completely ignore leap years in this calculation. The dates are:



February 2, 3, 5, 7, 9, 11, 13, 17, 19, 23

March 2, 3, 5, 7, 9, 11, 13, 17, 19, 23, 29, 31

May 2, 3, 5, 7, 9, 11, 13, 17, 19, 23, 29, 31

July 2, 3, 5, 7, 9, 11, 13, 17, 19, 23, 29, 31

November 2, 3, 5, 7, 9, 11, 13, 17, 19, 23, 29



Add them up, and you'll see there are 52 of them. 52 dates per year, multiplied by thirteen years that are prime comes out to 676.



So out of 36,525 dates someone might have been born in the past 100 years, only 676 of them meet your criteria. That's about 1.85% of them.



So, if we assume that the odds of being born on any given date is about equal (not true) and that a given person is a random age between 0 and 100 (also not true), they have about a 1.85% chance of meeting your criteria.



HOWEVER, and here we get to the mistake in your question, you were not born on a date with all prime numbers. 1957 is not a prime number; its factors are 19 and 103 (19 * 103 = 1957).



So it turns out you're not special at all. You're just normal, like the rest of us. :)
anonymous
2016-12-20 05:10:23 UTC
1
lord_dunpell
2006-04-21 03:31:17 UTC
That's not necessarily. Because, it's just a matter of date and it has nothing to do with the human behaviors. Human behaviors is not quite related to the dates they are born. You can find a lots of people who have shared the same birth day but with clearly different attitudes. To make you a special person, it is actually come from within of yourself. You're the one who can make you own look special to the others people. Behave wisely and pleasantly to the other people, it will make you look special.



That's what on my opinion...!!!
odandme
2006-04-21 03:21:28 UTC
You're no more or less special than the other millions of people who's birthdays work out to be all prime numbers.
zeus_daughter2
2006-04-21 03:24:55 UTC
Yes its special and did you know and I swear this is true that your birthday falls on National Hotdog Day in the United States? LOL Yep it sure does! If you do parties on your birthday you should go with the hotdog theme. Isn't that cute? I got thanksgiving for my birthday and sometimes it doesn't fall on my birthday your lucky yours is always on Hotdog Day!
Just Numbers
2006-04-21 06:27:17 UTC
so on July 23 your age will be the square of a very special prime: happy very special year to you.
anonymous
2006-04-21 03:20:33 UTC
Yes
priya
2006-04-21 03:31:55 UTC
YES THERE IS VERY MUCH SPECIAL YOU WILL DIE ON A DAY WITH A PRIME NUMBER DATE
icepero
2006-04-21 03:21:41 UTC
You're special, but only in a primal sense...
� Fuzzy Dice
2006-04-21 03:20:58 UTC
being alive means that you are special. we are all special, to be truly special you must know / accept and live like you are special.



your birthday is merely a coincidence.
ninjalettuce
2006-04-21 03:21:56 UTC
it's an interesting fact and does make you kinda special, however it is quite likely.
Emad B G
2006-04-21 03:51:37 UTC
u r special coz u born in 1957 and share us in Yahoo Answers, which is the best place for special people.
Queen Bee
2006-04-21 03:22:32 UTC
Surely you are. but thats not because of your birthday but because you are you. everybody is special in ones own way.
gruffalo
2006-04-21 03:20:01 UTC
It surely does my dear, and being born in 57 doesn't make you that old, fear not.
generaldisarray69
2006-04-21 03:20:51 UTC
special ed maybe
icprofit6000
2006-04-21 05:07:53 UTC
No, that not the reason your special, must be something else.:^)
ahmad_mrouh69
2006-04-21 03:24:39 UTC
ur special
grumpy
2006-04-21 03:20:54 UTC
yes, you're special. me, too. oh, and him,too, and her.
Mosi
2006-04-21 03:21:31 UTC
Not at all
ali
2006-04-21 03:19:50 UTC
ur too special ;)


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