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Search: id:A109397
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| A109397 |
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Numbers n such that 22 * 10^n + 1 is prime. |
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+0
1
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OFFSET
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1,1
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COMMENT
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All terms have been certified. Primality proof for the largest: PFGW Version 1.2.0 for Windows [FFT v23.8] Primality testing 22*10^12590+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Calling Brillhart-Lehmer-Selfridge with factored part 69.89% 22*10^12590+1 is prime! (47.5292s+0.3107s)
No more terms up to 31000.
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CROSSREFS
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Cf. A056807.
Sequence in context: A068442 A096549 A136812 this_sequence A133210 A105642 A064040
Adjacent sequences: A109394 A109395 A109396 this_sequence A109398 A109399 A109400
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KEYWORD
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more,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Aug 26 2005
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