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Search: id:A107465
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| A107465 |
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Numbers n such that 10^n*(66161819199+10^(n+10))+1 is prime. |
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+0
1
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| 3, 32, 96, 104, 603, 870, 1609, 2505, 4889, 5024, 5345
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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These are nonpalindromic 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)
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LINKS
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R. Ondrejka, The Top Ten: a Catalogue of Primal Configurations.
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CROSSREFS
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Cf. A007597.
Sequence in context: A136582 A119937 A114257 this_sequence A119940 A004256 A002059
Adjacent sequences: A107462 A107463 A107464 this_sequence A107466 A107467 A107468
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KEYWORD
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base,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), May 27 2005
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