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 '19970009815919133725119576652436605547354231944770099990041917386040844271179589591843856804912539986468649335101071275864507525169793745263723234541493166254475843455120989210651366283937688013419904985031158263051571908874017092408717668883081930935346287882595899492288898590798996545203904228545172537900594379422641935750446770148649433351902551202521202807312818711945568588023944359096096634324323891134577447430744073401114732681933125988511226428689296601672730574565315924863916317490575451838227467053822919963632215969265109874963177161881593097177175259120242775560751250494983216595482966921624537147980623409184380013999019269520585162363790928311852199975093937393624338126535142750110439698061784546369566829033440651430983165521689281280503721694283074894837895690347819787127' --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":"19970009815919133725119576652436605547354231944770099990041917386040844271179589591843856804912539986468649335101071275864507525169793745263723234541493166254475843455120989210651366283937688013419904985031158263051571908874017092408717668883081930935346287882595899492288898590798996545203904228545172537900594379422641935750446770148649433351902551202521202807312818711945568588023944359096096634324323891134577447430744073401114732681933125988511226428689296601672730574565315924863916317490575451838227467053822919963632215969265109874963177161881593097177175259120242775560751250494983216595482966921624537147980623409184380013999019269520585162363790928311852199975093937393624338126535142750110439698061784546369566829033440651430983165521689281280503721694283074894837895690347819787127"},"decimal":false,"detail":2}}'