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 '198470562434191946757666857915167643467758560135627654695003188110545240836205164762977751424326020545470795165443271591418981935080144599514145972058613287887184409992678556099230409642101546203073648514084412072891243100309713341309453838565166929968253235221873747990437352898068847040198187130342919441862659820345151902868197551855504838702935365046893939045075434885675293468264879110254478475098521520472660010680214451885333466138264457690256577558803053109949130120935319631515686685307552027471801112225928888854178649601453564968229218499755361922435218345098278645832951735398604722886958762252127739968844874457622065778870438172425986345544128424667327724986304805614468978162069065996055339118579091911222775848989944630249855758164963959169638819767270219628762018344861336288760375046714773901325282375218329559089681342192368582168619420843833710715857378157054529465949330501123023812083856170933529503693625905683008727998493855989805384671209206170348668166320742879294555003359960109729665246011329414201574385705393469829193214515674123737558081905764880935313700518225239694454144004048762087021068943359999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999998723' --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":"198470562434191946757666857915167643467758560135627654695003188110545240836205164762977751424326020545470795165443271591418981935080144599514145972058613287887184409992678556099230409642101546203073648514084412072891243100309713341309453838565166929968253235221873747990437352898068847040198187130342919441862659820345151902868197551855504838702935365046893939045075434885675293468264879110254478475098521520472660010680214451885333466138264457690256577558803053109949130120935319631515686685307552027471801112225928888854178649601453564968229218499755361922435218345098278645832951735398604722886958762252127739968844874457622065778870438172425986345544128424667327724986304805614468978162069065996055339118579091911222775848989944630249855758164963959169638819767270219628762018344861336288760375046714773901325282375218329559089681342192368582168619420843833710715857378157054529465949330501123023812083856170933529503693625905683008727998493855989805384671209206170348668166320742879294555003359960109729665246011329414201574385705393469829193214515674123737558081905764880935313700518225239694454144004048762087021068943359999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999998723"},"decimal":false,"detail":2}}'