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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 #1100000009071047571 2,333 digits created 2026-08-10

Value

20203969013945181185104688698285218080597249218729583599932104855365234455579707810031562514025998724488852783218690301979132982410415921792983075168398388817484223620404470201548575891413212151834577460946273753160148752494844030025978980779911946335856623044408816291061605706614566292407459284512407996259939549912989522831835932217420077794366683621824201079464424293966129242397470065512657950751307881773638490439604615091001851838287162536386570109211582353766611015942761594142747337350825870680314805275737242636535660090326756818666091155310605850101586200709441854936059478877930741109252814509777496545173342108832463525210851192364952723003179907886051700931961008917711798355136688627721888851087727470712156235921597756608947759598466774396712872953248762875349463745449688837995411274830823517465708540259228594794519776035142620603815705278082469572151086184280979230406310733086527919975624405295346605841664274147009345257448625595625769415685891453063657594554722558684727082970921969163693519012603676729418586061312211082933911282462460272843323235041748777921995171892844130124850454908417748070420661933093868852957294381492340228652880398903824193357759942364337989151917195150939729295262035781311098837966771031021413817609329065991289283062124481005812967783394075194170722200818930014065343017139074630276108235479344673452417275752172292159796644852151521819804861386475575292574490475503962319902761381267842899919144288538964770359681909080149899022503514039001751022433289895182029444100680845007535795836407358757183514504017906977430276809846260126680555652286583207130075083929669873132334860465940964703142979294461490368398258832726916382217801723014047272301078232022094922745867337494317793529901906094637284731722015572956274114729555204079429026815224964820141022734246729669960736169816927348803805939707545396948910510358282452215976341895887426891775616073500636426156019726357177809586445265353489994934905424991181881173106881425675821474775764567521402202408934027248352261306289937019569147416055311174511285629159002221405490634514292575309794891030451198569806323010701221575168842842664598936506826649282861587005126305987482661687175608243193277315721276498926857201386779502867811349074079087457311833740001810888257598971950611422047653187726218695765836686402448983776586380523
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 29 of the certificate chain of a 2,643-digit prime (201 intermediate primes).

Certified number2,643-digit prime
Certificatedownload
Certificate chainshow step 29 of 201

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009071047571 --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":1100000009071047571},"decimal":true,"detail":2}}'