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A101792
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Primes of the form 8*k-1 such that 4*k-1 and 16*k-1 are primes.
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3
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23, 359, 719, 1439, 2039, 2063, 2903, 3023, 3623, 3863, 4919, 5399, 5639, 6983, 7079, 7823, 10799, 12263, 14159, 14303, 21383, 22343, 22943, 24239, 25799, 25919, 33623, 34319, 36383, 38639, 39983, 40823, 42023, 42359, 44543, 46199, 47639, 48479, 49103, 54959
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OFFSET
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1,1
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LINKS
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EXAMPLE
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4*3 - 1 = 11, 8*3 - 1 = 23 and 16*3 - 1 = 47 are primes, so 23 is a term.
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PROG
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(PARI) for(k=1, 7000, if(isprime(8*k-1)&&isprime(4*k-1)&&isprime(16*k-1), print1(8*k-1, ", "))) \\ Hugo Pfoertner, Sep 07 2021
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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Douglas Stones (dssto1(AT)student.monash.edu.au), Dec 16 2004
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STATUS
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approved
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