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 '825871804514871420579941960750934928900736697496117169912547838296642401958191100122000887270446415119866920593375824489469098607124226845656217809480486881523541815725603617647881159627121861480379635607409991605955916400425245975094464996958132594622554627111784559407787410939070065901849664235104032843934381582963715899095365590315235852280881160400788280764285231524240200840496160838288931221561138100857466952624111054436438958324887430978520457672633671172658231769162401518861060932521061382532270853680661405858501735369287578442010566645994965295603942351049211363100526681520890219285994072857029514241905472952658618733514239484569185475729372784107512644956715436538849365595091183772766514401967387111326203803347212392826934505486380772298486406303375634699684618112228945649985604045254882731616717220259301524756695044629346310408178971803507454973593614352073078260954581330577100814999466663849949720125436131895665796295998794961255960113387379726733390073301782332084417599597261763156421062386473321182942831553077693069257469832098790316105983902059803796203594398790839943' --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":"825871804514871420579941960750934928900736697496117169912547838296642401958191100122000887270446415119866920593375824489469098607124226845656217809480486881523541815725603617647881159627121861480379635607409991605955916400425245975094464996958132594622554627111784559407787410939070065901849664235104032843934381582963715899095365590315235852280881160400788280764285231524240200840496160838288931221561138100857466952624111054436438958324887430978520457672633671172658231769162401518861060932521061382532270853680661405858501735369287578442010566645994965295603942351049211363100526681520890219285994072857029514241905472952658618733514239484569185475729372784107512644956715436538849365595091183772766514401967387111326203803347212392826934505486380772298486406303375634699684618112228945649985604045254882731616717220259301524756695044629346310408178971803507454973593614352073078260954581330577100814999466663849949720125436131895665796295998794961255960113387379726733390073301782332084417599597261763156421062386473321182942831553077693069257469832098790316105983902059803796203594398790839943"},"decimal":false,"detail":2}}'