Результаты работы OGR-25, Чего добился проект OGR-25 |
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Результаты работы OGR-25, Чего добился проект OGR-25 |
Paul B.Atton |
Oct 27 2008, 11:38
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Отже, станом на :: 25-Oct-2008 23:14 GMT (Saturday) :: даний проект оголошено завершеним. Довжина знайденої лінійки - 480, з наступними позначками:
CODE 0 12 29 39 72 91 146 157 160 161 166 191 207 214 258 290 316 354 372 394 396 431 459 467 480 Більш детально з інформацією щодо закриття проекту можна ознайомитися тут . QUOTE :: 25-Oct-2008 23:14 GMT (Saturday) :: distributed.net is proud to announce the completion of OGR-25! A little over eight years ago, distributed.net users undertook the search for the optimal 25 mark Golomb Ruler. This year sees the successful conclusion of that effort. We have proven conclusively by the exhaustive search of all possible rulers that the previously predicted 25-mark ruler is indeed the most optimal one. The total length of the ruler is 480, with marks at positions: 0 12 29 39 72 91 146 157 160 161 166 191 207 214 258 290 316 354 372 394 396 431 459 467 480. (This ruler may alternatively be expressed in terms of the distance between those positions, which is how dnetc displays them: 12-17-10-33-19-...) This shortest ruler was found by two independent computers. The initial report was received on October 10th, 2007 and a second, matching result was returned on March 24th, 2008. However it was not until the final stub was returned and verified that we could rule out the possibility of a still-shorter ruler. This final stub was returned on October 24th, 2008 drawing to a close the complete search of all possible stubs. Due to the nature of an exhaustive search, distributed.net users have also proven that the above solution is unique (the ruler's mirror notwithstanding). To celebrate the successful end of yet another distributed.net project all our contributors are invited for a drink...when we find a place large enough to host the 124,387 people that participated in this particular distributed effort. As previously mentioned, a successful match of the shortest ruler was found by two independent computers. We'll be sending those two users some free distributed.net swag and shirts for their noteworthy contributions to the project. We'll also be sending some swag to the user that submitted that last confirmed stub. (At the time of writing, we had not yet received permission from those three users regarding the publication of their identities.) Related Links: * https://distributed.net/ogr/ * http://stats.distributed.net/projects.php?project_id=25 Thank you all and keep those computers busy! -------------------- |
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