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A069589
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Smallest prime in which the n-th significant digit is a 3.
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8
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3, 31, 307, 3001, 30011, 300007, 3000017, 30000001, 300000007, 3000000019, 30000000001, 300000000077, 3000000000013, 30000000000011, 300000000000089, 3000000000000037, 30000000000000029, 300000000000000011, 3000000000000000037, 30000000000000000041
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OFFSET
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1,1
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LINKS
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MAPLE
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seq(nextprime(3*10^(j-1)-1), j=1..32);
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MATHEMATICA
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Join[{3}, Table[NextPrime[FromDigits[PadRight[{3}, n, 0]]], {n, 2, 20}]] (* Harvey P. Dale, Jun 15 2015 *)
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PROG
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(Python)
from sympy import nextprime
def a(n): return nextprime(3*10**(n-1)-1)
(PARI) a(n) = nextprime(3*10^(n-1)); \\ Michel Marcus, Mar 31 2021
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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