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 '5209531068128622965055520824773512241462413815359467527091224403567841312544183282694507735287989270877585131468481394870828537366808711380560827704915173166766044667973747824759594605610175046486174345381290137352071781696759703564063561317072419034022330538849446695644968460287591119175243832477809860695654450265523889333433834118441185269385770836690845466570770396727785437715750343829067923806924656364452741414377341890918312331689136185377093684428970716982308485206661579651578332044777710159508567918380533122074172325626900342074721779272779703422012868489930552426876616608733253851884413578136394036095468990888635337018209316350059809855877240105677480902059211320366358132304483122090215487385711243387347855834642667312752949993579849869450391338315634046473385274043989570956415321820101573832248254225248588389458983049857748874293769981911399814214050780862647010085643897461815017090685244477493294752893554419154487699328890266444053451333533474104809697117899411734365743483678130062240879881019434386889734132275171227248198374698547590440393523926515725492857808798108366476497444684574759974656735745141950759235412633919535950979804424571219194128057683501902130614252835055768413189043518478775316869957396646256603420878084196036850093891085139539376809928853567739702194757638370452455714423506841514341692705137189224520492155569329364123727634514708831847947775572344601305096462718359966161899479798520724790938579' --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":"5209531068128622965055520824773512241462413815359467527091224403567841312544183282694507735287989270877585131468481394870828537366808711380560827704915173166766044667973747824759594605610175046486174345381290137352071781696759703564063561317072419034022330538849446695644968460287591119175243832477809860695654450265523889333433834118441185269385770836690845466570770396727785437715750343829067923806924656364452741414377341890918312331689136185377093684428970716982308485206661579651578332044777710159508567918380533122074172325626900342074721779272779703422012868489930552426876616608733253851884413578136394036095468990888635337018209316350059809855877240105677480902059211320366358132304483122090215487385711243387347855834642667312752949993579849869450391338315634046473385274043989570956415321820101573832248254225248588389458983049857748874293769981911399814214050780862647010085643897461815017090685244477493294752893554419154487699328890266444053451333533474104809697117899411734365743483678130062240879881019434386889734132275171227248198374698547590440393523926515725492857808798108366476497444684574759974656735745141950759235412633919535950979804424571219194128057683501902130614252835055768413189043518478775316869957396646256603420878084196036850093891085139539376809928853567739702194757638370452455714423506841514341692705137189224520492155569329364123727634514708831847947775572344601305096462718359966161899479798520724790938579"},"decimal":false,"detail":2}}'