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A323114
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Numbers k such that 427*2^k+1 is prime.
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1
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2, 4, 6, 8, 12, 20, 22, 56, 66, 94, 136, 142, 174, 186, 200, 286, 352, 362, 512, 582, 842, 1056, 1080, 1144, 1242, 1810, 4802, 5106, 6914, 12982, 16760, 19958, 20108, 22194, 23512, 29636, 42816, 66178, 70624, 81390, 129958, 184046, 278876, 343432, 396612
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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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select(k->isprime(427*2^k+1), [$1..1000]); # Muniru A Asiru, Jan 05 2019
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MATHEMATICA
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Select[Range[1000], PrimeQ[427*2^# + 1] &]
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PROG
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(Python)
from sympy.ntheory.primetest import isprime
for n in range(1, 1000):
if isprime(427*2**n+1):
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CROSSREFS
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KEYWORD
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nonn,hard
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AUTHOR
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STATUS
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approved
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