Search
Member List
Calendar
Help
HP Forums
/
HP Calculators (and very old HP Computers)
/
General Forum 
/
challenge - prime numbers where sum of squared digits of prime number is also prime
/
challenge - prime numbers where sum of squared digits of prime number is also prime
|
challenge - prime numbers where sum of squared digits of prime number is also prime
|
|
01-05-2018, 03:31 PM
Post: #4
|
|||
|
|||
RE: challenge - prime numbers where sum of squared digits of prime number is also prime
(01-05-2018 02:01 PM)SlideRule Wrote: A happy prime is a number that is both happy and prime. The happy primes below 500 are Hi! Happy PRIMES do not fit what I had asked about. The prime 13 is happy per the list above, but although 13 is prime, 1^2 + 3^2 is 10, which is not prime. ? |
|||
|
|
« Next Oldest | Next Newest »
|
User(s) browsing this thread: 1 Guest(s)