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 '27491861490261291857458705410739678954049047115658867359000402948862152669968404074618376304474799417165380527188598126193591708027954767450728601567094307048654739760206339463669362624975478911011729180893114043804801377051993469423842650667904880993724271162115878100355657459981475542647904195286285804428857130310963581558206842974209957761452904727168244004591239104924387081663912673304829060986676554021127289372624819203625657712312579061045927644234823724727456720805413190037384330143878972125916311088860982750427659660103025676835823690765892047581239061079199353195348565525003213842193970871732516274181907370426217754393663053998338105721292162666548681142642707007441897124149180243572494115277253916353637967666702988644578519638640288299418458196595668727720202658562494906148133666615041483488404349244833281386586921174139857906277198072935097543233713380815211899831017608717535529827628148467900978517381560966637772334888605811740147351591606014280482013024650434195758766394210246528451572547101790013796362002292196371692394546557478400244464229441890354883518402645344148583335374102950533870875073926031309264827224883094285242794429543300875622588671774768850320417037646522983828732882879212955056815852812710144046284862449036700182722956362548108051457647102340682261436046110714520475492201267415723657052940897834259651' --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":"27491861490261291857458705410739678954049047115658867359000402948862152669968404074618376304474799417165380527188598126193591708027954767450728601567094307048654739760206339463669362624975478911011729180893114043804801377051993469423842650667904880993724271162115878100355657459981475542647904195286285804428857130310963581558206842974209957761452904727168244004591239104924387081663912673304829060986676554021127289372624819203625657712312579061045927644234823724727456720805413190037384330143878972125916311088860982750427659660103025676835823690765892047581239061079199353195348565525003213842193970871732516274181907370426217754393663053998338105721292162666548681142642707007441897124149180243572494115277253916353637967666702988644578519638640288299418458196595668727720202658562494906148133666615041483488404349244833281386586921174139857906277198072935097543233713380815211899831017608717535529827628148467900978517381560966637772334888605811740147351591606014280482013024650434195758766394210246528451572547101790013796362002292196371692394546557478400244464229441890354883518402645344148583335374102950533870875073926031309264827224883094285242794429543300875622588671774768850320417037646522983828732882879212955056815852812710144046284862449036700182722956362548108051457647102340682261436046110714520475492201267415723657052940897834259651"},"decimal":false,"detail":2}}'