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A107465 Numbers n such that 10^n*(66161819199+10^(n+10))+1 is prime. 0
3, 32, 96, 104, 603, 870, 1609, 2505, 4889, 5024, 5345 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These are non-palindromic strobogrammatic primes and they have all been certified. No more terms up to 8700. Primality proof for the largest (a "gigantic" prime): PFGW Version 20041001.Win_Stable (v1.2 RC1b) [FFT v23.8] Primality testing 10^5345*(66161819199+10^(5345+10))+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Calling Brillhart-Lehmer-Selfridge with factored part 34.91% 10^5345*(66161819199+10^(5345+10))+1 is prime! (15.1367s+0.0109s)

LINKS

Table of n, a(n) for n=1..11.

R. Ondrejka, The Top Ten: a Catalogue of Primal Configurations.

PROG

(PARI) is(n)=ispseudoprime(10^n*(66161819199+10^(n+10))+1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A007597.

Sequence in context: A197368 A114257 A197524 * A319219 A345687 A211224

Adjacent sequences:  A107462 A107463 A107464 * A107466 A107467 A107468

KEYWORD

base,nonn

AUTHOR

Jason Earls, May 27 2005

STATUS

approved

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Last modified September 28 21:22 EDT 2021. Contains 347717 sequences. (Running on oeis4.)