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 '1968847662304388659919085697982338657887312890715305412827052249808989015619164864037050455762715591135451396606493664744675904786369719242967108719237568059441435772315056487239649885319839708702828638396454225224564641540229601862896707538390493905623817530904835275172169458432852356887367959296571059443902688979087392112496617980853731971417431864117619254096232992057249092393068328236516188304596046362007289155674443031622744095047018814430168356666924116491463896517893532715639924933374118801814222143434074960971380953684979456991201437010048609759144609871678109896882161978161672585714214532296172399724010573616291688935829893507501699403930929694108401727703668367992040319295601496148291744065396282535626368836198236169223932974837740601205575520591399086098200163361080178832700073349736930633072194160340932159305969393312048168263955669561928701948260532117191362580414166512708324730485828189746842474246014632802292792555219769477778117142886962693453318687833756998987479656051796714273680098176622874127680958343924486405351280953569470313948668876580579500745165229091608860665811284861035916989287516488724337126246645136078936053560591233908822014141373938863565226306290503512868209845263044135007141655330040800309014792198076659135188815925127627598047667491908336907013899530054828170417517037082391025538614211644796740664249294374178152190590703241459119691976650344294409634442013226181166205843385361239480777063880959703067571273581997355243172050096717297405444511007760154569758678394352975553354820666508813675416580310426280943135085654456792686586741744247723888991372486413678124108402428910080722544929153910225446450469399031534667235346117524020649788173549243962255622509816887495361793' --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":"1968847662304388659919085697982338657887312890715305412827052249808989015619164864037050455762715591135451396606493664744675904786369719242967108719237568059441435772315056487239649885319839708702828638396454225224564641540229601862896707538390493905623817530904835275172169458432852356887367959296571059443902688979087392112496617980853731971417431864117619254096232992057249092393068328236516188304596046362007289155674443031622744095047018814430168356666924116491463896517893532715639924933374118801814222143434074960971380953684979456991201437010048609759144609871678109896882161978161672585714214532296172399724010573616291688935829893507501699403930929694108401727703668367992040319295601496148291744065396282535626368836198236169223932974837740601205575520591399086098200163361080178832700073349736930633072194160340932159305969393312048168263955669561928701948260532117191362580414166512708324730485828189746842474246014632802292792555219769477778117142886962693453318687833756998987479656051796714273680098176622874127680958343924486405351280953569470313948668876580579500745165229091608860665811284861035916989287516488724337126246645136078936053560591233908822014141373938863565226306290503512868209845263044135007141655330040800309014792198076659135188815925127627598047667491908336907013899530054828170417517037082391025538614211644796740664249294374178152190590703241459119691976650344294409634442013226181166205843385361239480777063880959703067571273581997355243172050096717297405444511007760154569758678394352975553354820666508813675416580310426280943135085654456792686586741744247723888991372486413678124108402428910080722544929153910225446450469399031534667235346117524020649788173549243962255622509816887495361793"},"decimal":false,"detail":2}}'