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 '139303575364947993321855056439417278506038512498534215887621699458241731660609218184329138339994199091400504166694674797251747298777799524390472560697154016311587295074423425024865442823460047346787422240854970196577767745470260889509480245135722761172252904532213366476809454826062282042391373076935252421082239343017423441116692266350973824891056156250773505496072864793433341703589758483137989163164416979747433134691377081999933853025832929233444434814090654163088222989245341124011837610277254143867729300732996830087912432161029971470590143' --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":"139303575364947993321855056439417278506038512498534215887621699458241731660609218184329138339994199091400504166694674797251747298777799524390472560697154016311587295074423425024865442823460047346787422240854970196577767745470260889509480245135722761172252904532213366476809454826062282042391373076935252421082239343017423441116692266350973824891056156250773505496072864793433341703589758483137989163164416979747433134691377081999933853025832929233444434814090654163088222989245341124011837610277254143867729300732996830087912432161029971470590143"},"decimal":false,"detail":2}}'