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 '3890023745432848462008130248404573659275745430333705756702231297026566348818429656826087464624899940624602246293936519414026718322202117852879421479413549488342176903995826985583520166819907664833063335373042777947191537011788461194635281994234503694051212873450086766972253609615949678544186397604199477288606265249438436035385140543374104219141451065886509853887025492692453503118654830871160745487914507857389419470486826276672815209502572704411529175662262956054496798213879731598571258888035269437055266650996933684539723590052430120694299992392702882265884450896873868632070588699165664539634126099807937254232515352852451830976023103461442360151062615356836018149104995257272262719263679936445705012588515176045550442253839864744791398699692533004926643364250014193766043425611762484795408036014317745500224809751224923368899566942499993800220885916223492628357596446617062129175573812324717603886633451005181455254618859616974667263514445877429700507316806457819720836336094764819295545988571769857248670235000253984009926713164054824772000964430370237951794167221402218371887980019238260834606798186846409619045247019987944580582914262464164330927449260378520496406598696260924478734536586870196281466827696158107830074369671545329573343619991549748582662515170503382005813343200571567490181955551642057189' --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":"3890023745432848462008130248404573659275745430333705756702231297026566348818429656826087464624899940624602246293936519414026718322202117852879421479413549488342176903995826985583520166819907664833063335373042777947191537011788461194635281994234503694051212873450086766972253609615949678544186397604199477288606265249438436035385140543374104219141451065886509853887025492692453503118654830871160745487914507857389419470486826276672815209502572704411529175662262956054496798213879731598571258888035269437055266650996933684539723590052430120694299992392702882265884450896873868632070588699165664539634126099807937254232515352852451830976023103461442360151062615356836018149104995257272262719263679936445705012588515176045550442253839864744791398699692533004926643364250014193766043425611762484795408036014317745500224809751224923368899566942499993800220885916223492628357596446617062129175573812324717603886633451005181455254618859616974667263514445877429700507316806457819720836336094764819295545988571769857248670235000253984009926713164054824772000964430370237951794167221402218371887980019238260834606798186846409619045247019987944580582914262464164330927449260378520496406598696260924478734536586870196281466827696158107830074369671545329573343619991549748582662515170503382005813343200571567490181955551642057189"},"decimal":false,"detail":2}}'