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Search: id:A062538
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| 5, 97, 20161, 161281, 1451521, 24908083201, 83691159552001, 1219553378446855442006016000001, 923374789356965521888370970732110324333114258287231764529152000000000001
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OFFSET
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1,1
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EXAMPLE
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4*4!+1=97, a prime.
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MATHEMATICA
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lst={}; Do[p=4*n!+1; If[PrimeQ[p], AppendTo[lst, p]], {n, 0, 5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jan 28 2009]
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PROGRAM
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(PARI) for(n=1, 55, if(isprime(4*n!+1), print(4*n!+1)))
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CROSSREFS
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Sequence in context: A139950 A102734 A117341 this_sequence A053980 A088995 A093749
Adjacent sequences: A062535 A062536 A062537 this_sequence A062539 A062540 A062541
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jul 10 2001
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