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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 #1100000009123228135 2,450 digits created 2026-08-30

Value

28310911276948220003328042091164730062835568893790435407922522585531608443782527679013306545937824747738912322676882917832761418195849331996330396445701330697438319904306491611410168308575985815915387180502564800855587421408874775951917012219609995460665094607617390731885612892886886071457003743333748432368183467749951421946754554443647648054685738580817625163991294634309954684964725390299225469801051971415848426949815283929451454400592813781954125157578407112315198580033262109624390980272121648031712599147781830216584929972377207735752898935887292936178173111372817027742186009089168765245642751291896996650948422017233570163970915630183512036657903346744022552106026377582194559663261439299882464354286959532554898137431785959431153455188556896291901546678818571824216130505998690534479464230812413889212860880763547873157419274303351899727192590226071699311111204647126698553166075118069613987258469706599010010292548680233074760915741670699256453049036985172927505196189882882518148575450792562559635374320473331208230865827841051304727628303346403953999076928083495755261119589943175127373297876276379006753434736508046461341190853365312866639690417424624849873815224416848172125737582344190144567647300812648064440975957175235898114244034831833059134678780634334078813730864750435020733566346977754551517364663452931479948003567917657651491013700702536359247611569731484818288558590329832302808581506091446478901323252072070177091678848167359397636265098992113832034785340663707192180400291382479103411977059145518760648494123341278302937407833835675383132323632222282723057758489420759297774115885788611903249953036805177562364790500728063591169427624690024189144293711157751105451693726437456510153921511257926621136363752691173612606461117054402490237308234716584747598161929243363592079171969629149179175854255279553384808806480192457843207068313745646829232764187573757370762045784441031398341764400947044272808998858504545738563468743927275714572836407677478003637359414887796479065934074171996643718462189288183433208282636290260940982959117145044919882561976842872697755983907736294448800594647689126564844771338765262397735233036997138521744990800791073827680880174482131162907306648575247365623469489130104682600220075890805569713003554096687753905801549644912882302042529653851982744952607625461062269486268613334865705805321130233973212556594859058632217611537535003037347587805873169197335738653891457607850301341863503747537
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 59 of the certificate chain of a 3,079-digit prime (311 intermediate primes).

Certified number3,079-digit prime
Certificatedownload
Certificate chainshow step 59 of 311

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009123228135 --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":1100000009123228135},"decimal":true,"detail":2}}'