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 '25380975073374817394546896486798158255329883431470514332047642846693430924849951790380300497109279669789198349971857089566262905608414106593097980884087924186447208353241447385267708264534630512271440461308167646807554055951568224875006011384762014232492508972524660333995343507152470859664393920239354285081033894274788920463465545358379870291380690138011194206483781975919893167421999308977297234471355154159219172259925125759615264308199728049674392520918506059108851478699367976427515417660401162906124079440637109952790443813422064544601766381456732972280252621852295872524113515692660388767399958410664860272473482387448429096951990537802450347470149827783416420125285783289245087144279837422853572421039187346442353259036261118193163901801168968139972963939421906697898011269992341243294241469985120463' --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":"25380975073374817394546896486798158255329883431470514332047642846693430924849951790380300497109279669789198349971857089566262905608414106593097980884087924186447208353241447385267708264534630512271440461308167646807554055951568224875006011384762014232492508972524660333995343507152470859664393920239354285081033894274788920463465545358379870291380690138011194206483781975919893167421999308977297234471355154159219172259925125759615264308199728049674392520918506059108851478699367976427515417660401162906124079440637109952790443813422064544601766381456732972280252621852295872524113515692660388767399958410664860272473482387448429096951990537802450347470149827783416420125285783289245087144279837422853572421039187346442353259036261118193163901801168968139972963939421906697898011269992341243294241469985120463"},"decimal":false,"detail":2}}'