Happy prime new year

This is going to be a prime year, and by that I don’t mean it’s going to be first-rate (though I don’t rule that out) — rather, 2011 is a prime number.

Since 2011 is a prime number, that means we can look forward to having several dates that consist solely of prime numbers. The first one will be 2/2/2011, and the last 11/29/2011. I leave it as an exercise to the student to determine how many of these dates will occur all year (translation: I’m too lazy to figure it out myself, and I hope someone will post a comment with the answer). *

The last prime number year was 2003, and the next one will be 2017. While searching for lists of primes on the Web, I discovered that 2011 and 2017 are so-called “sexy primes”; that is, they differ by six (“sexy” from the Latin “sex” for six); if they differed by four, they would be cousin primes, and if by two, twin primes. Thus 2011 is a sexy prime number year.

I suspect I am fascinated by prime number years because I was born in the middle of the largest gap in prime number years in the twentieth century (1951 to 1973). I had to wait more than a decade to live in a prime number year; I had a deprived childhood.

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* Here’s the list of primes 31 and under: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31. Don’t say I didn’t help you out. Oh, all right, the answer is 52.

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