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 '1872875210279432187929426075081922714458257949859690107961521977369611309863589697345278936697915700969528431039694103200977110395167974397320977682373476211261655849260044546632668637967962352265648729128196029924559865644334079150143282640012509211181651787942966463067150566535189036093186977835872331263463209171029999776890878361069213513980786843804600498906388954336499315723252477772464250685725125129014802063733192732335612348171797839602835456029027151526168793252261944803573768795989827632059835209451265683963915968613200413732202065272146946316213884140349868277745302158755005865335911911372519152018525622154264943576106507307151519359347293735791024602643614959983603010254169839362583095501991239178159078067635711485614945960701214935029575339720071823374771362158584595086494930276539901447750969872654533732386440766123717712753261515313815051064158101197462271488949618428841902717206247006209242196253192611534176259000489118195843516301910408766340926560690460232877932258588352455552268430367995463104292314187785150388876130889433023217681478646505708985794367404404899532581707719230361472647307835972369298968357' --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":"1872875210279432187929426075081922714458257949859690107961521977369611309863589697345278936697915700969528431039694103200977110395167974397320977682373476211261655849260044546632668637967962352265648729128196029924559865644334079150143282640012509211181651787942966463067150566535189036093186977835872331263463209171029999776890878361069213513980786843804600498906388954336499315723252477772464250685725125129014802063733192732335612348171797839602835456029027151526168793252261944803573768795989827632059835209451265683963915968613200413732202065272146946316213884140349868277745302158755005865335911911372519152018525622154264943576106507307151519359347293735791024602643614959983603010254169839362583095501991239178159078067635711485614945960701214935029575339720071823374771362158584595086494930276539901447750969872654533732386440766123717712753261515313815051064158101197462271488949618428841902717206247006209242196253192611534176259000489118195843516301910408766340926560690460232877932258588352455552268430367995463104292314187785150388876130889433023217681478646505708985794367404404899532581707719230361472647307835972369298968357"},"decimal":false,"detail":2}}'