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 '8248473008708770128361949973557572341944086350933237665736009559722405741252325761984828600549502356781674490503664539982399485135352857517801807950539573388643154337363694712869907953992629802361043357323038774001245045779160908755433406270114516907942667391359458180206203052672376584252319291290449960299602476512220441031668307215431040643423420757195013832671277536676566605764467381835320350463740441743964256190466623805707617985208072711888180697024454038393110413954761546979668685569807531851081752440681667810475375570194806236913631444983581449491668435573863169080420785156937545568174173550242253700183282027817257165218770615271239717963954509111178375792645943515111618559356133090512358830381791820194833648755513571028805296171178543642197905979268186561690957286348685894094587404805785811634583100471108836242331896187959222605227192809035278061060985252700894230078232670839702437371027262750606021134002769998857188744700727515351381507758710920829023296388354765275921307799753795854180747756084898820379553300473337086586761511189179124995517387802033168554584166636578972856057829561106005580857145798272635847730564820144320327706669128167259727883882541017955232994407067768270355366369284733' --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":"8248473008708770128361949973557572341944086350933237665736009559722405741252325761984828600549502356781674490503664539982399485135352857517801807950539573388643154337363694712869907953992629802361043357323038774001245045779160908755433406270114516907942667391359458180206203052672376584252319291290449960299602476512220441031668307215431040643423420757195013832671277536676566605764467381835320350463740441743964256190466623805707617985208072711888180697024454038393110413954761546979668685569807531851081752440681667810475375570194806236913631444983581449491668435573863169080420785156937545568174173550242253700183282027817257165218770615271239717963954509111178375792645943515111618559356133090512358830381791820194833648755513571028805296171178543642197905979268186561690957286348685894094587404805785811634583100471108836242331896187959222605227192809035278061060985252700894230078232670839702437371027262750606021134002769998857188744700727515351381507758710920829023296388354765275921307799753795854180747756084898820379553300473337086586761511189179124995517387802033168554584166636578972856057829561106005580857145798272635847730564820144320327706669128167259727883882541017955232994407067768270355366369284733"},"decimal":false,"detail":2}}'