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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 #1100000009028430566 2,259 digits created 2026-07-31

Value

251775393634967882452472612918662271499580807856307515031893850260926092669334857067636233018239175035980689865334374953847456839534007407156607032000159243990588065325119654614384611718247323940491281661875801108809430576161153850204762854717983926818253813560167570500161730816326165769612889237343962682861223830275015755642345326700533628345170451937110999527863799810810239032806844787197531762583698075623008796961876876073092745423166647716432310983430900011506649592440188517288294847262424961187864000447827441512283030788437737359947165465687308575451944358253885823882768469329081664934439514919119961174100769886482633962296800969238143430227530587917976378742991851899243785652758036048309956809392323964018130237201221345022426560614498494810049044053511655146709236087684069209794743320007521079784874204261665562752917625482648159205220936654249253122430037266713646802940688141728586865868972729733423885270611198225299548183883454510607684539231325647753681211997139413656579279513825605796898815224159328389631030876839082339779078750483666744086617100995109578105162125829615355106196655066343754579036208612017750139395271476718681830374550876289283292706893713230264668935651999613811234790269887796185602947005953492498664547493494087491561914393169190346276388961194697133356789375997331887299764525591695904627171913529725816744515447856567232097727979513094112085561217334743601964715335333760851811615067361166683050555416887010165096667082808354909479021016265844721006505223991841677755530860340072884445447524251622438648743068803291831057440668605543056300470384415928535808039588666175394155883594352838422437447632653905618304013288684745376685906227539198410625674647652239215025583560046493188608248253461467506030451075902589721401206156022108762574336374287499984566015191967754896315368836866431250482962575508841018565573533184331792052869351216050635503302479369440744828350348747577549034679736326668556469382809244816129424874917672202737763667345818844815069705599171426287412777704825876449134496028064183742684438030818415708852948030957391976698771090133969717950796904190029252820528750392355293394995529590658809582362955355731099065265266960865447038498915722763818888516013146394422301045037956406544174614491
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 41 of the certificate chain of a 2,771-digit prime (206 intermediate primes).

Certified number2,771-digit prime
Certificatedownload
Certificate chainshow step 41 of 206

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009028430566 --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":1100000009028430566},"decimal":true,"detail":2}}'