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 '25610448232189492446005920308194398823835070936250217893186802391983450847441976217982731875979495335930403039341974837549630687927863693780722262606685525926557834692757966548650889360029949328150699465026813618571128033400611075462958050416002725023573996364097617851161167328541781979222209780548897780224221327299099433705023252612689693342590169992310625387496624633603140782769274557889594899611009388301741881607552011777577274357260055063208191309851616643006689358544610160791553986703993704680881368890581601971666844783229045081705318272380727349382178647308782634653405434969600363019992938319392139918158452059409972081218827816396535662185294506717432335407175894004462347686225623346084061514666863075756461833424667726651182590037820577910392219042407300346185980751829312250506556106139353841023495759024207225442163637564989264219066046849084362457453589672931221353551933800597576920073734131155775450322956583051818664279389' --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":"25610448232189492446005920308194398823835070936250217893186802391983450847441976217982731875979495335930403039341974837549630687927863693780722262606685525926557834692757966548650889360029949328150699465026813618571128033400611075462958050416002725023573996364097617851161167328541781979222209780548897780224221327299099433705023252612689693342590169992310625387496624633603140782769274557889594899611009388301741881607552011777577274357260055063208191309851616643006689358544610160791553986703993704680881368890581601971666844783229045081705318272380727349382178647308782634653405434969600363019992938319392139918158452059409972081218827816396535662185294506717432335407175894004462347686225623346084061514666863075756461833424667726651182590037820577910392219042407300346185980751829312250506556106139353841023495759024207225442163637564989264219066046849084362457453589672931221353551933800597576920073734131155775450322956583051818664279389"},"decimal":false,"detail":2}}'