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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 #1100000008729256595 2,471 digits created 2026-04-06

Value

38858758562423140567170716663293720183981532243839192024255255426754801356041741124857720694826074988213038948527523995875077248066875121012233035181170379297686656567475971157785099075960309358151607455099282455323519784806243256677239970098261002028468724514559357576369623688092538531521155611052289650333028907958384756375242311194243349777830292931230318128392376092094040298105999999844310970317726346612055508088420268663484797014945651899192544367195321717553777521554419335508280973739097181311875254865751688390064447344011307572708866543043961834634241651779553048982623024756063850636901461591830280343537994800032624507785087682949798232667525716371510000532292183920461111901428010684644511407885227835344738038784007657140810013880457733569454695948714756411034491379762288937920556655348291138913520990757898645412739289442065518966534719563742671484632812218397340397972243796932803532179433667915668769388317613947683998356992286197469779876505936451219481657817551583521059950039166286930899889483562544604054673513855994716709328415441479845499642628321422820831581721784473600626008005926185624592919700404669211814082206412975776064244390632656654584464708648828636656806614508343928207871131664077739277479062419685614357068382460228287713924783276923509579081703642509964293031859815578213066344762844155417910361345615040333621662421424336462580126201235750696037168426420802535911100502490518189780489861886482225142521730126885401740623074659647868881060089056323785072147858993076062785273818842928778603303858239804860515386472197104515301577454667002812142471160810235236045874900387246506578171260463019589492848749138318193651091936840616357797902990534012465561550711466460893247763050402774871618332643621824305723274417905161082113724705230283783065152224238187973981019623967417482412738383650114694943729679387512726061876030726169514529685251991714943793238188658334237318321567541104162106523883005058292098924983139805164189604315915607280164157799903537244226593755537002363008337266056741179061554986688934979374551079293498938025893254170575499561048997646922346845884957263961009959961958389850234313662421478741805585254638073988802263844741621860956564322701867682816716935255378467548562903818789546271920730669369186199762736343399279051166163396779590228689420824548495722945165298787822390033747037812833287624564097737666279648928323983581042051107197308771884129560232853355524324029974046309191800529127322545780504877
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 25 of the certificate chain of a 2,785-digit prime (201 intermediate primes).

Certified number2,785-digit prime
Certificatedownload
Certificate chainshow step 25 of 201

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008729256595 --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":1100000008729256595},"decimal":true,"detail":2}}'