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Search: id:A071580
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| A071580 |
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Smallest prime == 1 mod (a(n-1)*a(n-2)*...*a(1)) for n>=2 with a(1)=2. |
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+0
1
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| 2, 3, 7, 43, 3613, 65250781, 5109197227031017, 21753246920584523633819544186061, 993727878334632126576336773629979379563850938567846991629270287
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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a(6) through a(13), with digit lengths 8, 16, 32, 63, 127, 253, 507 and 1012, respectively, have been certified prime with Primo.
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PROGRAM
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(PARI) terms=13; v=vector(terms); p=2; v[1]=p; for(n=2, terms, q=p+1; while(!isprime(q), q=q+p); v[n]=q; p=p*q); v
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CROSSREFS
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Cf. A061092.
Sequence in context: A000058 A075442 A082993 this_sequence A014546 A068393 A032053
Adjacent sequences: A071577 A071578 A071579 this_sequence A071581 A071582 A071583
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KEYWORD
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nonn
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AUTHOR
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Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 31 2002
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