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 '556606746431676311524309460519657964115734355892988501616700554890799691342802343779894326286896866375314181106212594017991482600834059696774283398553190118025348035443809532022718605282613156202260289699748890132323564083520848475935155569333709671250604208274594073472105413401940213366806623932410406214891320346816910957467694097045953174233624955247298677871167811813924508333342162666194881879855378708443280205730003762607173353071291238637084706499703277' --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":"556606746431676311524309460519657964115734355892988501616700554890799691342802343779894326286896866375314181106212594017991482600834059696774283398553190118025348035443809532022718605282613156202260289699748890132323564083520848475935155569333709671250604208274594073472105413401940213366806623932410406214891320346816910957467694097045953174233624955247298677871167811813924508333342162666194881879855378708443280205730003762607173353071291238637084706499703277"},"decimal":false,"detail":2}}'