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Search: id:A111870
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| A111870 |
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Prime p with prime gap q-p of n_th record merit, where q is smallest prime larger than p and the merit of a prime gap is (q-p)/log(p). |
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+0 18
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| 2, 3, 7, 113, 1129, 1327, 19609, 31397, 155921, 360653, 370261, 1357201, 2010733, 17051707, 20831323, 191912783, 436273009, 2300942549, 3842610773, 4302407359, 10726904659, 25056082087, 304599508537, 461690510011, 1346294310749, 1408695493609, 1968188556461, 2614941710599, 13829048559701, 19581334192423, 218209405436543, 1693182318746371
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Comment from Jose Brox, Dec 31, 2005: As I understand it, the sequence refers to "Smallest prime p such that its following gap has bigger merit than the other primes smaller than p." If that is the case, then it has an error. The sequence starts: 2, 3, 7, 113, 1129, 1327, 19609, 31397, 155921, 360653, 370261, 1357201, 4652353, 2010733... but you can see that 4652353 > 2010733, so in any case it should be listed after, not before it. But above that, its merit is 10.03 < 10.20, the merit of 2010733, so it is not in a mistaken position: it shouldn't appear on the sequence.
The logarithmic (base 10) graph seems to be linearly asymptotic to n with slope ~ 1/log(10) which would imply that: log(prime with n_th record merit) ~ n as n goes to infinity.
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REFERENCES
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Ed Pegg, Jr. (edp(AT)wolfram.com), Posting to Seq Fan mailing list, Nov 23, 2005
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LINKS
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Jens Kruse Andersen, Prime gaps
Jens Kruse Andersen, Maximal gaps
Thomas Nicely, Prime gaps
Eric Weisstein's World of Mathematics, Prime Gaps
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EXAMPLE
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The first few entries correspond to the following gaps. The table gives p_n, gap = p_{n+1}-p_n and the merit of the gap.
2, 1, 1.4427
3, 2, 1.82048
7, 4, 2.05559
113, 14, 2.96147
1129, 22, 3.12985
1327, 34, 4.72835
19609, 52, 5.26116
31397, 72, 6.95352
155921, 86, 7.19238
360653, 96, 7.50254
370261, 112, 8.73501
1357201, 132, 9.34782
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CROSSREFS
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For the gaps see A111871. Cf. A111943.
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KEYWORD
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nonn,new
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), based on correspondence with Ed Pegg, Jr. (edp(AT)wolfram.com), Nov 23 2005
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EXTENSIONS
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Corrected by Jose Brox, Dec 31 2005
Corrected and edited by Daniel Forgues (squid(AT)zensearch.com), Oct 23 2009
Edited by Daniel Forgues (squid(AT)zensearch.com), Nov 01 2009
Definition corrected (p_n could be misinterpreted as the n_th prime) by Daniel Forgues (squid(AT)zensearch.com), Nov 13 2009
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