PRP · Probable prime
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.
Is factor of
Primality
This is a probable prime: it passes probabilistic tests but is not yet proven.
Build an ECPP certificate (for example with Primo) and upload it - it is stored and verified locally, then the number is promoted to proven prime.
Primo input filedownload .in
From the command linefdb · curl
fdb
fdb number '7921495222857277924562017692371707655805632554031152398015308177520640294842849518694392255925414927026795307219989379417872004454555262434178635488484872208922322242265318342014109692743730299642813061599741439141228747097436075852238406977550950355017869325963039237585715127569889276519055380547914129760361920813090283384444376435293404160754361137852681297585567242722802908251762909640409746321337822240193271798989667863948364898812970775479556255844985715081062767759261684220512603710206631141367332663701135753537190842189422640929299939027126885560854733813065371654938187628899972658818934361203416392193308955102219162842139137559009725618456879673640490626148053235289075037947419879145564894051624715977519741194590598099545780406459297355979764877834605058599750387139026109303951677185447518816692899071713394334420235874816035110821036334261576712956726767668047436658594366016791894518894187241361811966574390613069127214247595599553299513342976201420872969239197643113490596379716774314325222543650770070782628909469527261848324310744549202581048780887723529269658949255068666929539840763516945140577979974814757944464150915470840033786396286115920902308435585444435760404493389991253788518148398335543345859055712734093384284981457669591380744211357903324083608653533770829209665662370833069111779234852349135440194484136302294113509976266510967621162833627486176609259203873658439577661375526145400756343393627820522121436133937046738776689912872262405146726752375070595469998036287636409059437543324203130366576484417930305795532417556892062152127661190633006280963305141270027262449778996835206197566520918878914752548522971037612608142954488905951495986968890555403561461556290802026960251616229729758887300617538875262909059486091' --detail 2
curl
curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"get_number","params":{"target":{"expr":"7921495222857277924562017692371707655805632554031152398015308177520640294842849518694392255925414927026795307219989379417872004454555262434178635488484872208922322242265318342014109692743730299642813061599741439141228747097436075852238406977550950355017869325963039237585715127569889276519055380547914129760361920813090283384444376435293404160754361137852681297585567242722802908251762909640409746321337822240193271798989667863948364898812970775479556255844985715081062767759261684220512603710206631141367332663701135753537190842189422640929299939027126885560854733813065371654938187628899972658818934361203416392193308955102219162842139137559009725618456879673640490626148053235289075037947419879145564894051624715977519741194590598099545780406459297355979764877834605058599750387139026109303951677185447518816692899071713394334420235874816035110821036334261576712956726767668047436658594366016791894518894187241361811966574390613069127214247595599553299513342976201420872969239197643113490596379716774314325222543650770070782628909469527261848324310744549202581048780887723529269658949255068666929539840763516945140577979974814757944464150915470840033786396286115920902308435585444435760404493389991253788518148398335543345859055712734093384284981457669591380744211357903324083608653533770829209665662370833069111779234852349135440194484136302294113509976266510967621162833627486176609259203873658439577661375526145400756343393627820522121436133937046738776689912872262405146726752375070595469998036287636409059437543324203130366576484417930305795532417556892062152127661190633006280963305141270027262449778996835206197566520918878914752548522971037612608142954488905951495986968890555403561461556290802026960251616229729758887300617538875262909059486091"},"decimal":false,"detail":2}}'