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A065315
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Smallest prime divisor of n-th primorial + (n+1)-st prime.
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3
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5, 11, 37, 13, 23, 30047, 510529, 9699713, 127, 107, 433, 1093, 375569, 13082761331670077, 941879, 32589158477190044789, 1922760350154212639131, 4129, 92388407, 5879, 40729680599249024150621323549, 1783, 4903, 10279098043, 191, 131, 109, 163, 337, 20261, 673327, 6599, 181
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OFFSET
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1,1
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LINKS
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FORMULA
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EXAMPLE
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n=3, 3rd primorial=30, prime(4)=7,sum=37, a(3)=37.
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PROG
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(PARI) a(n) = vecmin(factor(prod(i=1, n, prime(i)) + prime(n+1))[, 1]); \\ Michel Marcus, Aug 29 2019
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CROSSREFS
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Cf. A002110, A000040, A006530, A006530, A057713, A002584, A002585, A051342, A060881, A065314, A065316, A065317.
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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