{"id":3878,"date":"2025-05-26T08:30:00","date_gmt":"2025-05-26T06:30:00","guid":{"rendered":"https:\/\/www.svalbard.fr\/actualites\/?p=3878"},"modified":"2025-05-23T13:31:46","modified_gmt":"2025-05-23T11:31:46","slug":"il-gagne-14-fois-a-la-loterie-sa-methode-souleve-de-nombreuses-questions","status":"publish","type":"post","link":"https:\/\/www.svalbard.fr\/actualites\/il-gagne-14-fois-a-la-loterie-sa-methode-souleve-de-nombreuses-questions\/","title":{"rendered":"Il gagne 14 fois \u00e0 la loterie : sa m\u00e9thode soul\u00e8ve de nombreuses questions"},"content":{"rendered":"\n

Imaginez remporter le gros lot plus d\u2019une dizaine de fois, non pas par hasard, mais gr\u00e2ce \u00e0 un <\/em><\/strong>algorithme<\/em><\/strong> savamment \u00e9labor\u00e9. C\u2019est l\u2019exploit de Stefan Mandel, un math\u00e9maticien roumano-australien qui a transform\u00e9 la <\/em><\/strong>chance<\/em><\/strong> en calcul.<\/em><\/strong><\/p>\n\n\n\n\n\n\n\n

Strat\u00e9gie math\u00e9matique derri\u00e8re les victoires<\/h2>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n

Plut\u00f4t que de laisser le hasard d\u00e9cider, Mandel a mis au point une technique de \u201ccondensation combinatoire<\/strong>\u201d : acheter suffisamment de billets pour couvrir l\u2019ensemble \u2013 ou du moins la meilleure partie \u2013 des combinaisons possibles. Pour financer cet achat massif, il a constitu\u00e9 un consortium<\/strong> d\u2019investisseurs baptis\u00e9 International Lotto Fund. En ciblant des tirages de loteries moins pris\u00e9es, il a ainsi rafl\u00e9 quatorze gains, dont un jackpot<\/a><\/strong> de 27 millions de dollars et pr\u00e8s de 900 000 $ de lots secondaires en 1992.<\/p>\n\n\n\n

Cons\u00e9quences l\u00e9gales du syst\u00e8me de Mandel<\/h2>\n\n\n\n

Si son proc\u00e9d\u00e9 n\u2019\u00e9tait pas explicitement interdit, il a attir\u00e9 l\u2019attention des autorit\u00e9s am\u00e9ricaines \u2013 FBI et CIA se sont pench\u00e9s sur son cas. Face \u00e0 l\u2019ampleur du ph\u00e9nom\u00e8ne, le r\u00e8glement<\/strong> des loteries a \u00e9t\u00e9 revu : l\u2019achat en masse de tickets et l\u2019usage de syst\u00e8mes informatiques pour g\u00e9n\u00e9rer des num\u00e9ros ont \u00e9t\u00e9 limit\u00e9s, emp\u00eachant la reproduction de sa m\u00e9thode.<\/p>\n\n\n\n

Impact financier et trajectoire de Mandel<\/h2>\n\n\n\n

Malgr\u00e9 ses gains faramineux, Mandel n\u2019a pas connu un parcours sans emb\u00fbches. Apr\u00e8s sa derni\u00e8re victoire, il a engag\u00e9 de longues proc\u00e9dures judiciaires qui ont mis \u00e0 mal ses finances, le poussant \u00e0 d\u00e9poser le bilan en 1995. Depuis, il a test\u00e9 divers projets d\u2019investissement<\/a><\/strong>, sans retrouver le m\u00eame succ\u00e8s.<\/p>\n\n\n\n

Aujourd\u2019hui, retir\u00e9 sur l\u2019\u00eele de Vanuatu, il privil\u00e9gie une discr\u00e9tion<\/strong> totale. \u201cJ\u2019aime prendre des risques calcul\u00e9s\u201d, confie-t-il, loin des feux des projecteurs.<\/p>\n\n\n\n

Un risque calcul\u00e9 qui fait date<\/h2>\n\n\n\n

L\u2019aventure de Stefan Mandel illustre \u00e0 quel point les math\u00e9matiques<\/strong> peuvent infl\u00e9chir le cours du hasard. Mais elle rappelle aussi qu\u2019une victoire, m\u00eame r\u00e9p\u00e9t\u00e9e, n\u2019est pas exempte de complications<\/strong> juridiques et financi\u00e8res. Sa le\u00e7on est limpide : conna\u00eetre les m\u00e9canismes du jeu vaut parfois mieux que de se fier \u00e0 la simple chance.<\/p>\n","protected":false},"excerpt":{"rendered":"

Imaginez remporter le gros lot plus d\u2019une dizaine de fois, non pas par hasard, mais gr\u00e2ce \u00e0 un algorithme savamment \u00e9labor\u00e9. C\u2019est l\u2019exploit de Stefan<\/p>\n","protected":false},"author":3,"featured_media":3879,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1725],"tags":[],"yoast_head":"\nIl gagne 14 fois \u00e0 la loterie : sa m\u00e9thode soul\u00e8ve de nombreuses questions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.svalbard.fr\/actualites\/il-gagne-14-fois-a-la-loterie-sa-methode-souleve-de-nombreuses-questions\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Il gagne 14 fois \u00e0 la loterie : sa m\u00e9thode soul\u00e8ve de nombreuses questions\" \/>\n<meta property=\"og:description\" content=\"Imaginez remporter le gros lot plus d\u2019une dizaine de fois, non pas par hasard, mais gr\u00e2ce \u00e0 un algorithme savamment \u00e9labor\u00e9. C\u2019est l\u2019exploit de Stefan\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.svalbard.fr\/actualites\/il-gagne-14-fois-a-la-loterie-sa-methode-souleve-de-nombreuses-questions\/\" \/>\n<meta property=\"og:site_name\" content=\"www.Svalbard.fr\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-26T06:30:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-23T11:31:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.svalbard.fr\/actualites\/wp-content\/uploads\/2025\/05\/Il-gagne-14-fois-a-la-loterie.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"1200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Guillaume Chen\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Guillaume 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