challenge - prime numbers where sum of squared digits of prime number is also prime

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challenge - prime numbers where sum of squared digits of prime number is also prime

01-05-2018, 04:23 PM

Post: #6

Gene

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RE: challenge - prime numbers where sum of squared digits of prime number is also prime

Agreed... the Happy / Unhappy number process was used for the programming contest at this past year's HHC meeting.

Here, I'm wondering how many prime numbers have primes as the result of squaring then summing the original prime number's digits. :-)

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challenge - prime numbers where sum of squared digits of prime number is also prime - Gene - 01-05-2018, 01:34 PM

RE: challenge - prime numbers where … - SlideRule - 01-05-2018, 02:01 PM

RE: challenge - prime numbers where sum of squared digits of prime number is also prime - Gene - 01-05-2018, 03:31 PM

RE: challenge - prime numbers where sum of squared digits of prime number is prime - Didier Lachieze - 01-05-2018, 02:02 PM

RE: challenge - prime numbers where sum of squared digits of prime number is also prime - TheKaneB - 01-05-2018, 03:42 PM

RE: challenge - prime numbers where sum of squared digits of prime number is also prime - Gene - 01-05-2018 04:23 PM

RE: challenge - prime numbers where sum of squared digits of prime number is also prime - Gilles59 - 01-05-2018, 08:37 PM

RE: challenge - prime numbers where sum of squared digits of prime number is also prime - DavidM - 01-06-2018, 02:18 AM

RE: challenge - prime numbers where sum of squared digits of prime number is also prime - pier4r - 01-06-2018, 08:32 PM

RE: challenge - prime numbers where sum ... - wawa - 01-06-2018, 05:46 PM

challenge - prime numbers where sum of squared digits of prime number is also prime - Juan14 - 01-08-2018, 01:58 AM

challenge - prime numbers where sum of squared digits of prime number is also prime - Valentin Albillo - 01-08-2018, 07:43 PM

challenge - prime numbers where sum of squared digits of prime number is also prime - Dwight Sturrock - 02-01-2018, 01:54 AM

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