{"id":21495,"date":"2020-12-31T04:04:57","date_gmt":"2020-12-31T03:04:57","guid":{"rendered":"https:\/\/xmau.com\/wp\/notiziole\/?p=21495"},"modified":"2020-12-28T19:01:33","modified_gmt":"2020-12-28T18:01:33","slug":"una-curiosita-sul-2021","status":"publish","type":"post","link":"https:\/\/xmau.com\/notiziole\/2020\/12\/31\/una-curiosita-sul-2021\/","title":{"rendered":"Una curiosit\u00e0 sul 2021"},"content":{"rendered":"<p>In math.StackExchange, Ed Pegg <a href=\"https:\/\/math.stackexchange.com\/q\/3961535\/89\">ha notato<\/a> che 2021 \u00e8 la giustapposizione di due numeri consecutivi (20 e 21), ed \u00e8 anche il prodotto di due primi consecutivi (43 e 47); si \u00e8 chiesto se ci fosse qualche altro esempio. Robert Israel ha risposto dicendo che s\u00ec, ce n&#8217;\u00e8 almeno un altro: <\/p>\n<p>891077215721081784886888257701070827 \u00d7 891077215721081784886888257701070829= 794018604377235322848433897872605582794018604377235322848433897872605583 <\/p>\n<p>Se invece non volete che i due numeri giustapposti siano in ordine crescente, <a href=\"https:\/\/twitter.com\/edsouthall\/status\/1343606375218372608\">va anche bene<\/a><br \/>\n4803478892324963 \u00d7 4803478892324969= 23073409469011482307340946901147<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Per la serie, l&#8217;inutilit\u00e0 di fine anno<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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benzina...","rel":"","context":"In &quot;curiosita'&quot;","block_context":{"text":"curiosita'","link":"https:\/\/xmau.com\/notiziole\/category\/curiosita\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":22943,"url":"https:\/\/xmau.com\/notiziole\/2021\/09\/21\/poster-elettorali\/","url_meta":{"origin":21495,"position":4},"title":"poster elettorali","author":".mau.","date":"2021-09-21","format":false,"excerpt":"praticamente non ce ne sono","rel":"","context":"In &quot;curiosita'&quot;","block_context":{"text":"curiosita'","link":"https:\/\/xmau.com\/notiziole\/category\/curiosita\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/xmau.com\/notiziole\/wp-content\/uploads\/sites\/6\/2021\/09\/IMG_20210920_185641_DRO-300x175.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":13477,"url":"https:\/\/xmau.com\/notiziole\/2016\/07\/31\/quizzino-della-domenica-divisori\/","url_meta":{"origin":21495,"position":5},"title":"Quizzino della domenica: divisori","author":".mau.","date":"2016-07-31","format":false,"excerpt":"Ho dato ai miei quindici studenti un numero diverso da 1 a 15, e poi ho scritto un numero positivo (abbastanza grande...) alla lavagna, chiedendo loro se era divisibile per il loro numero. C'\u00e8 stato qualche mormorio verso il fortunato che si era beccato il numero 1, ma alla fine\u2026","rel":"","context":"In &quot;giochi&quot;","block_context":{"text":"giochi","link":"https:\/\/xmau.com\/notiziole\/category\/giochi\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/posts\/21495","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/comments?post=21495"}],"version-history":[{"count":5,"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/posts\/21495\/revisions"}],"predecessor-version":[{"id":21500,"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/posts\/21495\/revisions\/21500"}],"wp:attachment":[{"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/media?parent=21495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/categories?post=21495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xmau.com\/notiziole\/wp-json\/wp\/v2\/tags?post=21495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}