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 '426078397377182618755851409381632269339227627440100230557169706943599765422065352957353433643886997482702447289646817214665526968916871034547284095953819657685639001669462747710292467002680426578288608659629834358751182446332714581521777979902704751406278144148121638424212493576686676256875839711908976284941963891806830843336596903708616568428714710398625765686314300260360978617054202018187855469704605959743655556869328212488791829515445801738585472195533005369933576337355347894114991804715077089489601736769460519987008650074841129200529433463560467882037040041660434669407589582173073581937641964267236818545099326358195129532184338194885989079674225792673567960156561133362093631105441577694879350949323653066764395040091567542271092977743955831174397801738223642986702921028473883898254281053405240398009632713681020669321471' --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":"426078397377182618755851409381632269339227627440100230557169706943599765422065352957353433643886997482702447289646817214665526968916871034547284095953819657685639001669462747710292467002680426578288608659629834358751182446332714581521777979902704751406278144148121638424212493576686676256875839711908976284941963891806830843336596903708616568428714710398625765686314300260360978617054202018187855469704605959743655556869328212488791829515445801738585472195533005369933576337355347894114991804715077089489601736769460519987008650074841129200529433463560467882037040041660434669407589582173073581937641964267236818545099326358195129532184338194885989079674225792673567960156561133362093631105441577694879350949323653066764395040091567542271092977743955831174397801738223642986702921028473883898254281053405240398009632713681020669321471"},"decimal":false,"detail":2}}'