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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 #1100000008678588405 2,060 digits created 2026-03-11

Value

15485009221964327329429744748796707124283072342864252188611457011308887495036489921792816807008206621280163618953134791508444807430524538726533435347992170650276246903361761037946173842098799116281896247880314813196075036800577498610166138376198851712940136339781781552801487617679527141170792888800162836673393905330748235788762480398684165837808007966968243222763363670889886620722231954784240108284379434408644596498627070384855710254824163187651867111576062888839790331000791072149034561628069042269649365943288140468410582773115202809582820638458540882595975561736979806360080146618908296321437518434351985207240212371295945496591286791557052432329829225058936713137163766343719088411420516469434930242831088033914754720422331867685682187664589162056904874392563754880804532129858585183456765728491975223471730651979974309497349258875268011656258054796487473758331200461187236068678695947047669670490113221070837791527975629341154945042535378146163070256940038801757445284080394187594462713441895003290963338777631705630219540621631727978657999961464135257216323502222624030665169642568532216121113718534179799364992986992715594879140210663948430904264660753536726437955734353385077516048226369256826250019538347552255809551208274629091488926816824193126887695547186273102764147980401759689191470356310015312898713868531474555049832121991602989711341511722360423662651368807315322430787989863205481460807645963392204510513740918044326581616353337864373268246901878044679712453467411262430657800059560964701009431981356559664967959690765454158384281335732369568479235844786206151474461973546516440556255315777073793663343073525982376638022322992093358668979072445980462372680093583876959490342631942670064356581350800508849981703507407338295258484574040690414323453019172845355066096537975078054825494298337577376150643389737737744234561119314629449050882305342176639030154853398189844135963810373337526936078330805222729917978523722345004366972976678911084765240395646286421891868186653611037606807647441795818781563732139671967503776428367215518846299439
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 23 of the certificate chain of a 2,394-digit prime (160 intermediate primes).

Certified number2,394-digit prime
Certificatedownload
Certificate chainshow step 23 of 160

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008678588405 --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":1100000008678588405},"decimal":true,"detail":2}}'