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 '2500263665397083012561230963621319867745408654854149380976292922572598336976435722503939851297004730228119295198370625524985389796440107970413489525348462015152984721501820322848300300038968685623271840262431340469298291215726252558275038534375181597947916347997765125929413755405798574303061857313612303972546981355257158002419992281145655540706978802203087821830525914854551091249636211456303742293966789896586308461577884022577229527159335841935102262502152867990663338529261467301959832592332475265711451066161739132451117848522156305693108552462724689766396252952671664978659827612710546088307005316475754410577994859394557708135491724394250153371301597783688965432887497370632837891959947279760058827824956137608723443589911423920834533552683258383056993723409258590169395079016745516694714117958393009864537471452018829257521503101116713551891979006600345383936074204324981476010244447984007858571736194618236696937615275024165773210404520241370825265809021636366122573466816202767737365321811385232375229503947078626285914546734891628717201263331638841076806851064113137923455729744373744417468035790519772814557881502335462936495207221023544850426582962894263167290472035430247049109664095593337993606893641571452574842331239123351867406943157494389150359565340996305949672692598760980701877685381961970484572968528417' --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":"2500263665397083012561230963621319867745408654854149380976292922572598336976435722503939851297004730228119295198370625524985389796440107970413489525348462015152984721501820322848300300038968685623271840262431340469298291215726252558275038534375181597947916347997765125929413755405798574303061857313612303972546981355257158002419992281145655540706978802203087821830525914854551091249636211456303742293966789896586308461577884022577229527159335841935102262502152867990663338529261467301959832592332475265711451066161739132451117848522156305693108552462724689766396252952671664978659827612710546088307005316475754410577994859394557708135491724394250153371301597783688965432887497370632837891959947279760058827824956137608723443589911423920834533552683258383056993723409258590169395079016745516694714117958393009864537471452018829257521503101116713551891979006600345383936074204324981476010244447984007858571736194618236696937615275024165773210404520241370825265809021636366122573466816202767737365321811385232375229503947078626285914546734891628717201263331638841076806851064113137923455729744373744417468035790519772814557881502335462936495207221023544850426582962894263167290472035430247049109664095593337993606893641571452574842331239123351867406943157494389150359565340996305949672692598760980701877685381961970484572968528417"},"decimal":false,"detail":2}}'