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 '73718540475181164236631614516680796279608031546255232086470169460674274541305977121155051425623826441297996789175313443112590193414307151184985728043496742434634967435576210952408054578891393240655704969436368907289576503268503569546803314826644856108342063820042200239577191372108545914142333131142393241451042313465214201196028952457500487601498898386117680369031169713772259004350187268882202026871403472721889166036748493518406635775499347013986771011194795785324572937136873572067715928235535783705425799669191914965298798342090146668143319498757492656002907514580856430195965184825540327889124260215649603449829035787819263772244993713503161823758781009403515151425798845008714623714162387184386715849171234830769708718520152229787270719358249715296034558584792907678921579528377901361487643914503226564869811098111220811751104842181515990400027696010380287619195505987759012487625202557404107222793446395956416338791129023463368466373365768026156376686691381636678048627276358141927607296461306287869421294866968739489573826166268091143797834636719137073776026972857689420209354950939305064165719356574786872946907479523740090239' --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":"73718540475181164236631614516680796279608031546255232086470169460674274541305977121155051425623826441297996789175313443112590193414307151184985728043496742434634967435576210952408054578891393240655704969436368907289576503268503569546803314826644856108342063820042200239577191372108545914142333131142393241451042313465214201196028952457500487601498898386117680369031169713772259004350187268882202026871403472721889166036748493518406635775499347013986771011194795785324572937136873572067715928235535783705425799669191914965298798342090146668143319498757492656002907514580856430195965184825540327889124260215649603449829035787819263772244993713503161823758781009403515151425798845008714623714162387184386715849171234830769708718520152229787270719358249715296034558584792907678921579528377901361487643914503226564869811098111220811751104842181515990400027696010380287619195505987759012487625202557404107222793446395956416338791129023463368466373365768026156376686691381636678048627276358141927607296461306287869421294866968739489573826166268091143797834636719137073776026972857689420209354950939305064165719356574786872946907479523740090239"},"decimal":false,"detail":2}}'