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 '165853665715343015450232013962151884243141685863102984982425044562039519967327768470595389824099797748201605428265080470447841803130771480128864306131297436637131566890560344209234562882895867191513570961393518631002987479358304186728176586054214884148633429634115430704556757252731133869547876584133165805584715177184132089317004528991748036527073222781303490488927220086436247728450538867701641960208465638084214464630831095229637963154124919224072229710298147438005331915374295974997523189299358371934077035004844236136015695540037440473614572584108785966278568336120154805420050116240037182467239664276545592804991510496602527555763674437879476571881767168062005167347694522203786995722133255062755428926198322473090945157574484973223704772486497261740194748487973619151160754079858705172291222971913345257080681194701660236536297257684612576508410400633760348776213121909779463361578758904241106226453229644768133788022846001207752245446417051742889805599494658020385280810593074389261249' --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":"165853665715343015450232013962151884243141685863102984982425044562039519967327768470595389824099797748201605428265080470447841803130771480128864306131297436637131566890560344209234562882895867191513570961393518631002987479358304186728176586054214884148633429634115430704556757252731133869547876584133165805584715177184132089317004528991748036527073222781303490488927220086436247728450538867701641960208465638084214464630831095229637963154124919224072229710298147438005331915374295974997523189299358371934077035004844236136015695540037440473614572584108785966278568336120154805420050116240037182467239664276545592804991510496602527555763674437879476571881767168062005167347694522203786995722133255062755428926198322473090945157574484973223704772486497261740194748487973619151160754079858705172291222971913345257080681194701660236536297257684612576508410400633760348776213121909779463361578758904241106226453229644768133788022846001207752245446417051742889805599494658020385280810593074389261249"},"decimal":false,"detail":2}}'