Fab Doctor Who night and an unreveled mystery
OMG.. Last evening/night was so fab. I've started to re-watch some Doctor Who episodes yesterday evening. I've watched: The Shakespeare Code, The Lazarus Experiment, Human Nature, The Family Of Blood, 42 and Blink back to back. If you think that watching Blink is creepy, try it watching during night-time, turn off the lights and see a lot of shadows on your radiator as well.. That's really creepy *lol*. So, there was still one thing that puzzled me right from the first time I've watched it. I never understood the "happy prime" bit in "42". Firstly David's talking way too fast to understand a bit and on the other hand that was really technical.
So, since I got bored a bit today, I've browsed the net and after reading stuff on several sites, I finally found one that explained it in a way that even I was able to understand it *gg*. So if you are interested, you can read this or else skip this part *gg*. I'll try to explain it in English...
Take a number and sqare each diget and sum it up. Now split the result and do the same. Carry on until the result equals "1". If this is possible, the number's a happy number. A number is "unhappy" if you end up in a loop. I found an example on the site and then out of curiosity I've tried it myself. Here are both results:
7² = 49
4² + 9² = 97
9² + 7² = 130
1² + 3² + 0² = 10
1² + 0² = 1
Now my own happy number:
2² + 8² = 68
6² + 8 ² = 100
1² + 0² + 0² = 1
Well, a happy prime is simply a happy number that also is a prime. It's as simple as that.
So here are the first few happy primes:
7, 13, 19, 23, 31, 79, 97, 103, 109, 139, 167, 193, 239, 263, 293, 313, 331, 367, 379, 383, 397, 409, 487
Does that ring a bell *lol*? It was really fascinating to finally understand that bit *hehe*