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A178430
Numbers n such that 10^n - 53 is prime.
0
2, 3, 11, 15, 23, 29, 44, 71, 83, 95, 159, 383, 404, 548, 633, 6409, 8793, 24146, 25727, 64436, 74335, 76875
OFFSET
1,1
COMMENTS
The next term, if it exists, is > 100000.
See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "99947".
EXAMPLE
10^3 - 53 = 947 which is a prime number.
MATHEMATICA
m=1000; For[n=1, n<m, If[PrimeQ[10^n-53], Print[n]]; n++ ]
PROG
(PARI) is(n)=ispseudoprime(10^n-53) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A042235 A050587 A293026 * A295128 A360520 A066687
KEYWORD
more,nonn
AUTHOR
Robert Price, Dec 21 2010
EXTENSIONS
Corrected terms a(17) and a(18) by Robert Price, Dec 24 2010
a(20-22)=64436,74335,76875 from Robert Price, May 29 2011
STATUS
approved