Sorry. I probably should have linked happy and sexy. I was saying that the “happy” component fit well with the topic. Sexy was just an added bonus.
To summarize:
If you take a number, sum the squares of its digits to make a new number, then do the same with the next number and it eventually reaches one through that process, it is a “happy” number. “Happy prime” just refers to those prime numbers which are happy.
Demonstration: 3^2+1^2=10 and
1^2+0^2=1
a sexy prime differs from another prime by 6 (in this case; 37).
I upvoted your post to a nice round 20. It’s a much nicer number than 19 anyway.
I’m saddened that it’s no longer prime.
Upvoting to 31, which is quite a fantastic number, since it is both (aptly) a “happy” prime, as well as a “sexy” prime.
Explain?
Sorry. I probably should have linked happy and sexy. I was saying that the “happy” component fit well with the topic. Sexy was just an added bonus.
To summarize:
If you take a number, sum the squares of its digits to make a new number, then do the same with the next number and it eventually reaches one through that process, it is a “happy” number. “Happy prime” just refers to those prime numbers which are happy.
Demonstration: 3^2+1^2=10 and 1^2+0^2=1
a sexy prime differs from another prime by 6 (in this case; 37).
You forgot primorial.