Search: id:a174268
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A174268
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Primes p such that 11^p-10 is also prime.
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0
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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For p=3, 11^3-10=1321;
for p=17, 11^17-10=505447028499293761;
for p=23, 11^23-10=895430243255237372246521.
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MATHEMATICA
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Select[Range[10^4], PrimeQ[#] && PrimeQ[11^# - 10] &] (* Vincenzo Librandi, May 18 2015 *)
Select[Prime[Range[25]], PrimeQ[11^#-10]&] (* Harvey P. Dale, Jul 18 2022 *)
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PROG
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(Magma) [ p: p in PrimesUpTo(2500)| IsPrime(11^p-10)];
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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