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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 #1100000009080279403 1,838 digits created 2026-08-13

Value

25364786683943183576724455832618106892249014252375663357700117127871189702565414805016557475191728377956875333083301803682603899531902023367266398346261072431079130669640715986119127058966356892885829532497764794987570264731366622482161121495584082298500296409604160658194751058703580134371419676129514367420049357991408725899243908605752544365659645569006006365569233866410508552904601686631576514871691106328512436398229066632168236213863779635069368777341840940158504848178972745969865704457142179629891684247967682114825634376887093332055140078248903182752888845343301852617737748409712988247465496106791186442056013466145883736500090786968385358429884136482977471584064872743691476219296730932325412550137651182948751336083227803383562146993068792089514695445411694695386317550390284938322139900518198597239007685958233977360686404249105738848351232378973802401707501266722417318500662914772363742987168406299583602299387141501286858267705530245592833116173153633204044318810269257098882808195004676207333093904670647936054969595638775407284096726574751554012898373640377243217750634413528870363088787346857368073794677745124877789742850559747796697280889634574285646696890354189284960108204480364152519376297241829173180518570417359240780287824172111002087567860051434342467779645051227864039352011857433349324531468041089831848738472402857692800293067561249868271800491180397870301766733685327645360158759424357276556112357987430844128275992326365078974650276967270139533676172723387812192588393550994731722699064211914410605833637677973304565690339420002881244462018129743543120724661290950615796866741301600252206579611126590109507128494085804136020564829932293794672611655062910693490745901644124715785067438021956260437839440941686314577818264210084306574150584021370970103152977368271151654415215577815755639708487166483862787
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 4 of the certificate chain of a 1,868-digit prime (143 intermediate primes).

Certified number1,868-digit prime
Certificatedownload
Certificate chainshow step 4 of 143

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009080279403 --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":1100000009080279403},"decimal":true,"detail":2}}'