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 '321821306759786272241956909135544765314169202566509719183547966136723954176534122645684905774784173463263250571952274991838968725233671412293933653423585751364978731171860086401106504073383531334338943990933053445157356100290158071267180308434777362620219128792127781344026348539404785195570475073784347699639623736566889605878006177932287607257465778074914304788121752465336992843351578700516911429416869556088616339368347770659964524905657551214756249822487162325620006300432632422049262534777636180281923008431115351767846100486368292034903557090501610285129207586858991788060173605062322375284446375688408157901539043478129438480158262992112789408541925304473571565181886389016736389184228352773352233430490059725216808411192355219671815145021251689188594547801203271978490531342848287010967627202414840151457537879659279752709494573526941887124439488971146408775428890123305592268596271959067746004394020816064140346817738787023063078807429917436573327239043247491787780794236640922165286058771801488415701256991628611589079916247469472606265842363010841' --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":"321821306759786272241956909135544765314169202566509719183547966136723954176534122645684905774784173463263250571952274991838968725233671412293933653423585751364978731171860086401106504073383531334338943990933053445157356100290158071267180308434777362620219128792127781344026348539404785195570475073784347699639623736566889605878006177932287607257465778074914304788121752465336992843351578700516911429416869556088616339368347770659964524905657551214756249822487162325620006300432632422049262534777636180281923008431115351767846100486368292034903557090501610285129207586858991788060173605062322375284446375688408157901539043478129438480158262992112789408541925304473571565181886389016736389184228352773352233430490059725216808411192355219671815145021251689188594547801203271978490531342848287010967627202414840151457537879659279752709494573526941887124439488971146408775428890123305592268596271959067746004394020816064140346817738787023063078807429917436573327239043247491787780794236640922165286058771801488415701256991628611589079916247469472606265842363010841"},"decimal":false,"detail":2}}'