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Search: id:A109503
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| A109503 |
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Numbers n such that 66 * 10^n + 1 is prime. |
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+0
1
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| 0, 1, 4, 5, 11, 30, 60, 64, 869, 1685, 12109
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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All terms proved prime. Proof for the largest: PFGW Version 1.2.0 for Windows [FFT v23.8] Primality testing 66*10^12109+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 7 Calling Brillhart-Lehmer-Selfridge with factored part 69.89% 66*10^12109+1 is prime! (27.9892s+0.0059s). No more terms up to 38800, although another is 65460 found by Peter Benson (listed at Caldwell's Top-5000 Primes site).
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CROSSREFS
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Sequence in context: A000769 A050831 A056799 this_sequence A067371 A068719 A034773
Adjacent sequences: A109500 A109501 A109502 this_sequence A109504 A109505 A109506
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Aug 29 2005
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