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Enter a value, an expression, or a term with a variable like 10^n+1 to list a range. Switch to Database id to look a number up by its stored id. Reading never stores anything; use Create to add a number to the database. See the expression syntax & functions reference.

P · Proven prime
id #1100000009121227915 2,009 digits created 2026-08-30

Value

18613559437378815259112814223646642606666040395190567004131654946739839426259260094302680526181610915157644950272941981889663341296285215501891946321833400493057828620553792306669541114565983218653819994151766497362535659135477636964503930605840910145957150892175711884499925956217040852376678236774215075496095964764787445640243232073248607961440559159916765911504742446865211020466550421912663652413421005804683213990846423087885057965023943309396979141199616285447484187454496119686210039303160806271746313691184065478317967553327095702790179571796147181442365551548176103541710804045231444823637799965095300702054397089077923301310980290658647585770311375976272482278182093126722298511263567737857977902534818446394382538144850335486369548457667043398528434493276833546955437141763684415561639438894314162488580541494157548533412963604986099966622789607572108830225228754964679486040836731133517925314525426931145106382731217494400609225157800143653919539482401947445589204711532346676813906277638036999327673673677740532390283320262411924759979601049891724048723831713034745855193772051052114423891306277418253729923535906244984409766988131821189436538887480920439007200930289804758035725031694432838821394526738254679667872366949731606018993429212495508211385606526496552989794551813007802092706156552939755655490234099268000917277612974483492773795682429697576523192574951379861444926929368673844744741097303518086832319851985329993979984379030395657194598631548991337437575854899416919006802611257729012830785609744104360114362053144469002900991550595796989217557971546040062884049830406940928294738856147745340596844409674786153738651885262319305383386028052321728422673796444894394218341893926522559449202942191475163686591500746385931059613820741640662394346035374614917391668479440068580460785951575138269359531340463803199271124504061166983551024932857088570142280887397352260727038489819598707079420932698384769523403990211695344701978291081996329089483850743763280142230800233406157961276226447
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 76 of the certificate chain of a 3,048-digit prime (218 intermediate primes).

Certified number3,048-digit prime
Certificatedownload
Certificate chainshow step 76 of 218

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009121227915 --detail 2 --decimal
curl
curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"get_number","params":{"target":{"id":1100000009121227915},"decimal":true,"detail":2}}'