

A178531


Numbers n such that 10^n  93 is prime.


0



2, 3, 4, 5, 6, 7, 11, 57, 61, 70, 127, 223, 237, 240, 310, 467, 651, 1935, 2333, 3457, 4456, 6048, 11289, 12150, 24693, 28437, 31123, 32909, 52041, 58225, 68297
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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 "99907".


LINKS

Table of n, a(n) for n=1..31.
Makoto Kamada, List of nearrepdigitrelated prime numbers.
Index entries for primes involving repunits.


EXAMPLE

10^3  93 = 907 which is a prime number.


MATHEMATICA

m=1000; For[n=1, n<m, If[PrimeQ[10^n93], Print[n]]; n++ ]


PROG

(PARI) is(n)=ispseudoprime(10^n93) \\ Charles R Greathouse IV, Jun 13 2017


CROSSREFS

Cf. A108330, A108328.
Sequence in context: A059768 A271835 A118599 * A175500 A222259 A243575
Adjacent sequences: A178528 A178529 A178530 * A178532 A178533 A178534


KEYWORD

more,nonn


AUTHOR

Robert Price, Dec 23 2010


EXTENSIONS

a(2931)=52041,58225,68297 from Robert Price, May 29 2011


STATUS

approved



