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A105044
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Numbers n such that 1000*n - 1 is prime.
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1
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2, 3, 5, 9, 14, 26, 33, 36, 42, 50, 53, 57, 60, 71, 72, 74, 78, 80, 86, 95, 99, 101, 102, 105, 108, 134, 135, 137, 138, 140, 144, 158, 162, 165, 173, 180, 183, 185, 189, 192, 200, 203, 204, 213, 222, 224, 231, 240, 243, 248, 254, 261, 267, 269, 273, 276, 278, 287
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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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If n=2, then 1000*n - 1 = 1000*2 - 1 = 1999 (prime).
If n=99, then 1000*n - 1 = 1000*99 - 1 = 98999 (prime).
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MATHEMATICA
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Select[Range[300], PrimeQ[1000 # - 1] &] (* Harvey P. Dale, Oct 05 2016 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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