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A273006
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Numbers k such that 88*10^k + 3 is prime.
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0
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1, 2, 3, 7, 19, 21, 31, 50, 55, 151, 167, 287, 542, 603, 926, 1046, 2066, 2139, 2651, 2787, 5756, 6028, 6925, 10135, 13037, 36476, 74234, 119295
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OFFSET
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1,2
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COMMENTS
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For k>0, numbers such that the digits 88 followed by k-1 occurrences of the digit 0 followed by the digit 3 is prime (see Example section).
a(29) > 3*10^5.
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LINKS
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EXAMPLE
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3 is in this sequence because 88*10^3 + 3 = 88003 is prime.
Initial terms and primes associated:
a(1) = 1, 883;
a(2) = 2, 8803;
a(3) = 3, 88003;
a(4) = 7, 880000003;
a(5) = 19, 880000000000000000003, etc.
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MATHEMATICA
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Select[Range[0, 100000], PrimeQ[88*10^# + 3] &] (* Corrected by Georg Fischer, Jul 22 2019 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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