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Task/Additive-primes/PARI-GP/additive-primes.parigp
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Task/Additive-primes/PARI-GP/additive-primes.parigp
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hasPrimeDigitsum(n)=isprime(sumdigits(n)); \\ see A028834 in the OEIS
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v1 = select(isprime, select(hasPrimeDigitsum, [1..499]));
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v2 = select(hasPrimeDigitsum, select(isprime, [1..499]));
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v3 = select(hasPrimeDigitsum, primes([1, 499]));
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s=0; forprime(p=2,499, if(hasPrimeDigitsum(p), s++)); s;
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[#v1, #v2, #v3, s]
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