René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Can python calculate simple factorial?","articleBody":"# Bug report\r\n\r\n### Bug description:\r\n\r\n```python\r\n# Add a code block here, if required\r\nimport sys\r\nimport math\r\nsys.set_int_max_str_digits(60000)  \r\n\r\nnumber = int(input(\"please Enter integer number: \"))\r\nfactorial = 1\r\nfor i in range(1, number+1):\r\n    factorial = factorial * i\r\nprint(\"The factorial of {} is: {}\".format(number, factorial))\r\n```\r\nThis is simple code for calculating factorial but for big numbers obviously the result is WRONG.\r\nAny number after 5008 factorial you can see that the zeros in 5008! disappear and the first digit exactly before the zero in 5009! is wrong so the result for any number bigger than 5008 for this code is obviously wrong.  Here is 5008!\r\n```\r\n1663717263053762160808596589286058209572975380574466643706447570494304566066802344813824616449272136479704772058908441305478924188491837963706453361140106290757132970249377593561576505638250687873195392333029830028761022439623606469670473060480272572393457872049442565628638448813483865153157230798337701097413724807131248325142364080753420804218004478624354341638071008827473790199056489216805400659168735974813118818867351455159632320663408461449942016499766760651306756780247022197374733524296339701427242014558352652772212274426359432025176590166867056579202605684729514070533959797230802691931644513559583871841480032682055593772632340137154265276815668232601683809003492811776166376059228196176705918989194201051396665413528828576694069678615052230554213658133464729539494412327638981873921277357882359750148402654115417019184734449225003094814049367863881314372752274886085189676178834311805002225301182736489439171556803390185755069371405797691500423930467719150136651882647151197231688327660954722583850138236779229077810638429832670471451758637880956093146042623943093695523935905638688728553238817470203438097369724290824658838597627611789817281769301557537756058026048045696593228301142521210612001148135430969094383793649011713469058108088108847464800196031865003243022544187283782412541308730126510008037125315612746108897132519789569805225940124752411232758854710225925355419978316140375929836349393789461229808574201423339132350514140122673619008228794085208871378922819821284338432749430949130982295825760311909284519830792041110498714429023135503414266174883505288678384006221473720990000581202689428154569975023163619330322579523919313839233905156654124653299908287704875203065741501300887920253220138429233203057463388382274875015294259288304900509557957241747136865099168334333032404207438197642527682924772414503418246374099788172014851198951935250383112383487832395142137282968422498352853090479811353505662443426889036207159885208974164147199429269062091937072365984736156862810734804700105786994690670192274023784143979437155934612388375968296735069349104948992744952266907266923152675928813357746117582674828391327127999121380649514972197619467278278306510884527501460804125790482069060123968656070918232118814464265853062174528215818167638717086114736749843024727025547973042863639464626484911734855110066311106824942029792061532325213377782519976578214145628135693019458930316808595527441244738642653613325078357317326559647025870810094848674365881915479076465751289065370237393892911630065746574840812369876703089623558365871125987461108599287129226453367513143964245075848262384951268970914676459114279768260446451761468293021683027523678898634987055548091659366842696425405429803340166143240888866998781556997285904409945011980942979694487912545582689239452315441865174904770288116800365467673782855673603752609616420053363600468051089050462546053590401722107558219869423223469111256428645584981148031780596231981516167901762924831409489025890539807145309392703880199589910951801057150500913175590828793202686283157946973364571375145469192711984551652601625418925683557967216621090759004808186286222498746294968447884263464001754567733825919111024630875460296063082433258125625404733453237708089307384123176617838655916212234989113651095493883536017255748216978133731584409608246760001217769645907563532208161189498133908431622757692215686212346421989015123404381399013962592729313271224002992421981454909851078336984639485180371781805844100290206527340482888836650638166692023799198666454104672429722808082613866690934325115667821252959839102886949622354208091302032691265942132762649697762904056770657508255297425166442779678281948368405365988498304271402740565006356281263450116310113821425842806475188730274812976583015675961042223970998014154843216916845114590425311702556393047122639144067333995890608581851090627805527612482392576468569323830271072143426788585603211661237849750161347083318584145193323759455173673372699040804767596127252920784526710170418575889581529409505806026929256712913636271883070116641126212761658028472128560907484812680919072990992734780433605909602739147985142343861323235505133755271210330045931468634267475983240472025581051693136429976481234382544353315342412555060459450194121589391883320444997267379691826056982195108871036176454952937183472279829413967288660126368756466675822157544612982011911628536534235133458175266650261721290203431636487255349335633055268335511745164475991039977790791425851903531779137655541816185472799813056544678441238366294431833626429840134580095383661000178826182115107263530622989353302920848611840887776000103637988479741771432876916578068311820092728805765923052817601374347822956865665628853185753638696800088182088322643672679151160693146901938277949784253349893997901663264107531456203439732671984764792359811331520402391888790906346816016364345832683115835476218150791663154750037433755748290452062190244770271362729921027519675882014986121629308467795661173008460824015775660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3661934501230755033521766869866455100951423508907170678342564082015605173295895868147525849999539489812315878736926238310400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\r\n```\r\nThe last digit before the zeros starting are 4 so in 5009! we expect that it was 6 because 9*4=36 so we know that in the 5009! we have a lots of number but the last one before the zeros getting to started is 6 but it is not and the zeros are disappear in any number after 5008! including 5009!  Here is the result for 5009! with this code:\r\n```\r\n833355977063629466349026031573386557175103368129750341832559588060597157142861294517244750379440413162684120324307238249914393126015561636020562488595079241040247904797913236614993671674199769555683572019614641861406396140007464480657939955994568531511883048109565781123384999010674068055216456906887354479694534755892042286063810168049388480832798443342939089726509768321681621510707395448697825190177619849783891216370656343889459829420301298340275956064733170410239554471225733418665004022320036556444905525092278843773601128260163439501410954014583708640522585187481013597930460462432909068388560736841995561405397348370441646920711539174700571477156968217710183419929849549418681737768067403464911994821687375306644589705636590234066059502018279662284605621359052483026332751134914366020647167828563273998849334889446412384909633485616804050192357328363018150369311614490440071508797978106783125614653362432707560081032802818144044714248137164063672562346771280522303448928017958034693352683325372220542250534242802715845075348789503184639150185901714570907056852750333095632087939495134419184132317323670824902142972494897274071612253551670745519476438243150170662009465247466089423548056042288874395551375101037372419376842238789967276651206341333721695118418192361180124429992383410446610441941542920368863025796070590424525946573679162595515437673408488482786488910324352166010529867138554714303255027411349141130011114817492950571394372532787447215761221802957281123673702440448481325120964189962419709031979123340235360615983243733392248806057497688573660205926999147799099002548716336186843891291124427134562624100489102656922558580083531184302072263092968051038837924061311371989215629918001614759254837967339202911411483411240681484895160894477511924665237580782391140855728173418667415931267505793199142116377018502424762199608786583895362238965555024366916900992889055246726696565038882829424944113021337506970986317912528718236166386501175158821332194120873201851279548121754340972581897063674282988705640556699310058513477719300071407647345337522519834596236966668950465946590493850001807175372742610895030297161821541215758414759899567342049573787591159689603731302059825481716786608452468392216095899825922942468314165150765798843221183303320170233388434871637996371085767096979697170397007831406292287988924632215233408613462722843621541699380931264256268027465545133168633446978195689425499695319489586105194914531749180248873727195258688776509700989870251463469401694820692843951910600959435499932459337762916071240577592440385464847007119269297382923029530491787333811690358492394628622090627531161438370342735921657627687319467974561028486610760326265016124039112176851506639485579788493089221149361233479689681899940509518941456501254338528968995394082369040041664804830266109799437317705303062757797832406908119682156864804729827474446790505376689318243432222603675912332594092635677828345108573517057049118900652599541448501993049048053013053068571389399085474805373591974586395757149526685907409653446142515225559233815638958313801810365518629433061922788154172339874894185778805504361185508420510768849622019149695545227569118478862977873402882712237605518062297997990818995125765230986726767981934068707299167875382748430708506047027833732886263191043404281884347186150630772770802084609980815635098573283067939819615274733399839328030837223764322774297675313254642766093862698113017556103098904170510764344405138995605918126848225506547309835364449544847879018278304657696034721018612026861030420048154568581285825489003450438011665607583406636073065837222832933188175055110414300811233609438642036422345885078480265871188340851427937734247823638800609545632749011683861284862163259736013152204661763422034994653819970432552088886049987072905290160967353647717898344038631810497277303729947263327598541605838649211295467788781092430441553106374306582780036642478402528648721114038939855818754034278798327335871111096492992384949539108088900140988020969429124362664663091388081221458238888864687498440408586229821425540119972314506461689196158559142671872363661188260851519193200120012039225757800040136808664521498015349254320007072638904578720005152437613548793092037775219450302216466575655014448829784138602235504126394355210899131230487635671942381530033502020786285926235201264966553456214889857298110114157919318714096642689766534733949998378349199991065116096194262898906716466204482218597383909257833152886023911924875407425209218479068170051660895727303325426360023229431216297676880905463478706923411169777675794989574034621457228302489055367069433053069671100686998451912268429502653310728047513954417390684447858808150857156336528410824519094011913492560743997623227164170408040812215644986816391197283180883425046932502961903548943128991462506412302962095397168684493029495958569558097095364989120142596900827590972721990037671731544074214293750568254318687437951093605428925591417442684605649301306548324120611518846681559938026749502028200065450933095676770074990418814341830619304407248181298811835206421821758751955498413507758848691120151064008840940257294779370664916224974742434729107126378983051210269434054229702063640022848146194408376877340375763285881059110506517024058439274877935087124148056470191945387666203144923851952150706370950365566087002905241032065612279104897909613908679166171246368914688811389339694162377685179271480274962980579888319266361570893244103640036868306967962234581478262446933116029891842730585253031043295795525751565729003605839558148648954770266767988263756670560930503304202110581766252239127970928473876457377263726907493081089243021599904294059588234906664262571446508231234344913374436644083800202728569265360359707781509163195583797566099944749755217550232967854021858539682892939559564917733446939666652235526151354974936424104860024030446742122043609773545029558472784493895670646197268621697414250983063975250265124509205075387249863820639629024155240918120878606764788862163706716740045112909120471428443292185175189113936023410776128590010843778225777781944460648078822833242388599985257544517606035230556548474479506272517470068753456884298534655903107669931101298352789010989656862674859893881130052286314960456021386279842772451751388352803987932818042723545740763633524107142487562899927131432371385236787289831002446452965329626569572301046388791025383381466979379908709759389525935682761715832564416009499849604640992672362563275314674238123173952204415213346572271883620676514056837858003186370429756333542470907983514685063014446301092154813981889673831626608366486928871637499433219290138293605883269277367658568043062971026538822977044771993676317417217544670675136206683503974719229347270087229682525987812907053021174870266355926738904473978871540598898585281146608962101040564785422785514418645438235867212889242526136798836709306953038306071005594475096021675880955799881566872080206323994101903818277642086660624004049309068052742994605262236078959893038606134303258756601420102294432945622386441470008870043923705734038984666481489220109587167299801698262912724562897207573983755160181681670211531012291027905057394335540618990936067405604148631242353489064297054451034029567135414364572618094666768405739624234166998211700490916197790321934317730863551199640479291975199756579064863436284256794078351751979607432909879578776051503635081713347675845846866198376956492987565806962282422654824738707883279475459645978426613823432983439921709937351943388324074664133366189810605285894768636068883164174546942394961512922643111411584220688031226813386483791785849190545790007377365178711630766571156783365519103654038108255149783126504031958167117495519451485453424778861743057792552763643551347669040968879769136334695246640029434548800785344115203371369097571428637689881713756395059281315833717134905234024609646573396892404393096872230236163503953681541592335521472712583483207604278352793540715356114911457426098135866079663046852774403707652449001937358300074827062910514060167960545659821509211948814571700049670756693176693208352833651940450511584291532630351614990201534596707052122288691961289919816559123392565113517522329320721367982602865981587\r\n```\r\nIn the line `sys.set_int_max_str_digits(60000)`, I make the int max str digits so much bigger than the digits of 5009!.  Max digits (60000) is for 20000! so it is not overflowing, but it is still strange that python really can not calculate the simple factorial.  Of course I test the math.factorial code with import math but you can test that this happened after 5015! again the zeros disappear and you can calculate again the first digit before the zeros is WRONG.\r\n\r\n### CPython versions tested on:\r\n3.12\r\n\r\n### Operating systems tested on:\r\nWindows\r\n","author":{"url":"https://github.com/amir80aaf","@type":"Person","name":"amir80aaf"},"datePublished":"2024-04-03T22:07:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/117524/cpython/issues/117524"}