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 '47948991695532331942672814095456874668151594741737600655746331524740179997166258395864130840397602792095777613286850503962872307069943110443477274983171310025603026957871022525150699004670780041555155421896576554560909376718698897930392441761778916131085907826243899972433937899506920984821682633000633846297828059118745837518777816639909926236653326310140409227981574642116811515197884928765110384248201579123995741108100277580704279627811065715354097117340259880063126792557208165567272626353834037644734028203207339805602706078065503307193102394392659192610296820986300215442040381047762770733969502390528743093199859619521527496323101304905301799490655580771356295902357944810899290141936917068105747595463480445099883653015520529641654427517624656162580176398084441767296713264837915032514272480446133784545000384785151536822508234656010407163571225542422455423318889710528644839278855580329924363688106380362567326109896459970847082159027460255661015630145556035232109117936644927068825135512701799235771671095722832281656464822370131170394915662911556774685262147971393860034862825787' --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":"47948991695532331942672814095456874668151594741737600655746331524740179997166258395864130840397602792095777613286850503962872307069943110443477274983171310025603026957871022525150699004670780041555155421896576554560909376718698897930392441761778916131085907826243899972433937899506920984821682633000633846297828059118745837518777816639909926236653326310140409227981574642116811515197884928765110384248201579123995741108100277580704279627811065715354097117340259880063126792557208165567272626353834037644734028203207339805602706078065503307193102394392659192610296820986300215442040381047762770733969502390528743093199859619521527496323101304905301799490655580771356295902357944810899290141936917068105747595463480445099883653015520529641654427517624656162580176398084441767296713264837915032514272480446133784545000384785151536822508234656010407163571225542422455423318889710528644839278855580329924363688106380362567326109896459970847082159027460255661015630145556035232109117936644927068825135512701799235771671095722832281656464822370131170394915662911556774685262147971393860034862825787"},"decimal":false,"detail":2}}'