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 '25112783994591581945666625206101949941230987622834675404514367747650944731731275124496326383813445045086623458652919532347248359920136231283364647679941103402836119946523383104238584502157694994884326175728438121478216797055264392393440289493748475649837437855943026913145544446066430196719082403712034496636493448224419718083525156083052992807044579836527229371076792362407288261760915699665111454562453125910335730343954815369941046074196439032958801462225099158140777305104300684819637577248490867414576005324170423358585790118278977844037188608362243800772228234671213540354026744854870397186058667081634645816715845213727515209953010416825202438880510164733199888079309382715153654811311428239737636197985687580227185027108432828811055981660732449930012571122494091241855703430484832846697121742468143180429477491136779735945058260663245128621742730842347028659126874992543335471273106748888610468613067413071611638617645259375945493782266149885624074358672510459289544575026873991294196657351950292037553926897966631500029361973085310960038923168339498475880778494455389188452953609087093687349438380474033101668478481615199127060093533346023103031501509169958754835363019939814353281341404826073832162687059921217077123382166607998941296759445802380033082257012639341845075273323331543549' --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":"25112783994591581945666625206101949941230987622834675404514367747650944731731275124496326383813445045086623458652919532347248359920136231283364647679941103402836119946523383104238584502157694994884326175728438121478216797055264392393440289493748475649837437855943026913145544446066430196719082403712034496636493448224419718083525156083052992807044579836527229371076792362407288261760915699665111454562453125910335730343954815369941046074196439032958801462225099158140777305104300684819637577248490867414576005324170423358585790118278977844037188608362243800772228234671213540354026744854870397186058667081634645816715845213727515209953010416825202438880510164733199888079309382715153654811311428239737636197985687580227185027108432828811055981660732449930012571122494091241855703430484832846697121742468143180429477491136779735945058260663245128621742730842347028659126874992543335471273106748888610468613067413071611638617645259375945493782266149885624074358672510459289544575026873991294196657351950292037553926897966631500029361973085310960038923168339498475880778494455389188452953609087093687349438380474033101668478481615199127060093533346023103031501509169958754835363019939814353281341404826073832162687059921217077123382166607998941296759445802380033082257012639341845075273323331543549"},"decimal":false,"detail":2}}'