1. Primes by type
  2. Happy primes
  3. First 9

First 9 happy primes

Happy primes: Primes that eventually reach 1 under iteration of: x -> sum of squares of digits of x.

First 9 happy primes have values between 7 and 109.

Checkout list of first: 10, 50, 100, 500, 1000 happy primes. You can also check all happy primes.

List#

7, 13, 19, 23, 31, 79, 97, 103, 109

Table#

 123456789
1 - 97131923317997103109
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