Page "Happy number" Paragraph 33
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Wikipedia
A happy prime is a number that is both happy and prime.
The happy primes below 500 are 7, 13, 19, 23, 31, 79, 97, 103, 109, 139, 167, 193, 239, 263, 293, 313, 331, 367, 379, 383, 397, 409, 487.
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