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 '956268846816878648605109976581572066977866211455583328329047304642621982849531090537935247987627998791959925407556419103744586569065117859195191542133660158958644704556587971952811734018333830578365524271900975798444667242514656092257688367295836355964783145605898097583129466124065861985529449962822205896372003275869596550372595049511085186474593987671' --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":"956268846816878648605109976581572066977866211455583328329047304642621982849531090537935247987627998791959925407556419103744586569065117859195191542133660158958644704556587971952811734018333830578365524271900975798444667242514656092257688367295836355964783145605898097583129466124065861985529449962822205896372003275869596550372595049511085186474593987671"},"decimal":false,"detail":2}}'