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 '2563300964703519830964817125289592355611528627906331033137892068316172007113146916857168524628634117559555995707871774936026936548162375579547988596426288921660156528766754983143645936220857005248363509516567663506175599255443905315665757083281825180086595318695006667372911586071601264814510361683483382477620568057867061184859013225119295304977926631059051563219603571621330309181171515885429165938125603382545525755074821711716666079976612851753493257087263799257442394356922194899060304190598933642438100839015455575343696064933024196030903288220498749511104394574077900140134454713071591383810217615403202880550798404102146906906059359420211589989361726403224244993278471327957275163698519469085225147618907987913857962773791325932882349771209502668087512844199793749544442281085958159833053906457493244736513803266263962860523146074449138447371565961561295577063' --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":"2563300964703519830964817125289592355611528627906331033137892068316172007113146916857168524628634117559555995707871774936026936548162375579547988596426288921660156528766754983143645936220857005248363509516567663506175599255443905315665757083281825180086595318695006667372911586071601264814510361683483382477620568057867061184859013225119295304977926631059051563219603571621330309181171515885429165938125603382545525755074821711716666079976612851753493257087263799257442394356922194899060304190598933642438100839015455575343696064933024196030903288220498749511104394574077900140134454713071591383810217615403202880550798404102146906906059359420211589989361726403224244993278471327957275163698519469085225147618907987913857962773791325932882349771209502668087512844199793749544442281085958159833053906457493244736513803266263962860523146074449138447371565961561295577063"},"decimal":false,"detail":2}}'