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A352046
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Primes of the form (5*4^k + 1)/3.
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0
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2, 7, 107, 6827, 27962027, 1789569707, 114532461227, 7870610804782742022827, 37167908664217705235892863787747269176634027, 9743344248872686121357898884775220131039550286507, 623574031927851911766905528625614088386531218336427, 46011642311937091916231705748513503016340726481135910367750161491995307
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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EXAMPLE
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107 is a term because it is a prime and (5*4^3 + 1)/3 = 107.
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MAPLE
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select(isprime, [(5*4^k+1)/3$k=0..120])[]; # Alois P. Heinz, Mar 01 2022
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MATHEMATICA
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Select[(5*4^Range[0, 200]+1)/3, PrimeQ] (* Harvey P. Dale, Sep 04 2024 *)
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CROSSREFS
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KEYWORD
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nonn,changed
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AUTHOR
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STATUS
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approved
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