bcrypt hashes for 'password', all possible work factors / costs (cost 4 through cost 31)

bcrypt-ascending.txt

#-----------------------------------------------------------------------------
# bcrypt hashes for the plain 'password', costs 4 through 31, and how much 
# time it took to generate the hash on a reference system (CPU).
#-----------------------------------------------------------------------------
#
# htpasswd version matters - this one is from apache2-utils (2.4.18-2ubuntu3.10)
# Note that the official Apache version now stops at bcrypt cost 18:
#
#     https://bz.apache.org/bugzilla/show_bug.cgi?id=62078
#
# I am not sure if the Ubuntu version is being modified downstream.
#
# bcrypt-cli (https://github.com/bitnami/bcrypt-cli) supports costs up to 31,
# but is slightly (~20%?) slower.
#
# CPU: Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
# (You should always test bcrypt processing times in your own environment!)
#
# Scripted with:
#
# for cost in $(seq 1 31); do 
#
#    echo "- Cost: $cost"
#
#    # Apache method
#    time htpasswd -bnBC "$cost" "" password | tr -d ':\n'
#
#    # bcrypt-cli method
#    # echo -n "password" | time bcrypt-cli -c "$cost"
#
#    echo ""
# done
#
#
# Potential uses:
#
# - Picking a cost for a non-interactive / non-web purpose
#
# - Showing the scale of difficulty to the uninitiated
#
# - Deliberately delayed authentication of specific duration 
#   (like Louis Wu's droud timer)
#
#----------------------------------------------------------------------------
- Cost: 1
htpasswd: Unable to encode with bcrypt: Invalid argument

real	0m0.002s
user	0m0.003s
sys	0m0.000s

- Cost: 2
htpasswd: Unable to encode with bcrypt: Invalid argument

real	0m0.002s
user	0m0.002s
sys	0m0.002s

- Cost: 3
htpasswd: Unable to encode with bcrypt: Invalid argument

real	0m0.002s
user	0m0.003s
sys	0m0.000s

- Cost: 4
$2y$04$zUcb3oYdYO2qDyL7.PcYLe6LEmQ/opRhWvZu00X9AN4DSkDXMgnPO
real	0m0.005s
user	0m0.005s
sys	0m0.001s

- Cost: 5
$2y$05$zBSxEpfbkATn4dlMz5D.N.TmC.IHqZm.FbNVq8btct725AR.ZhnNq
real	0m0.006s
user	0m0.007s
sys	0m0.000s

- Cost: 6
$2y$06$kw6gjuHS67Of5YrX.DII7ejTf69pLQfsf9JtwAWMAucbbpeGKQ5Ue
real	0m0.006s
user	0m0.003s
sys	0m0.004s

- Cost: 7
$2y$07$9lgxIxaRmiXb3gpCFU/lculmXqGiSNnK.uAnZooNmv8Ng3CNv515G
real	0m0.015s
user	0m0.015s
sys	0m0.000s

- Cost: 8
$2y$08$e9vYvkoOWF3uNGQw8vZ4ieLglE.drzpUTGoAjjSo51Lm0PRUHP4OK
real	0m0.023s
user	0m0.024s
sys	0m0.000s

- Cost: 9
$2y$09$Mx7FsppJiL34mQBKChHGn.7p/T96MFgq.NYEnLcFqyyps6TW2wJ36
real	0m0.042s
user	0m0.037s
sys	0m0.005s

- Cost: 10
$2y$10$PkfCah3bEQJOff2Av8GkJ.juUdfDg.WsXU8r50Wu7PivT7YUoBR6K
real	0m0.066s
user	0m0.067s
sys	0m0.000s

- Cost: 11
$2y$11$lvST5XPMtpDodYP8/ZXIT.8fVsRBk7uWryduk1ewrhwsZWncRtdvO
real	0m0.129s
user	0m0.130s
sys	0m0.000s

- Cost: 12
$2y$12$4HzMep8Ak2aXyx9Ldg32qOWYR5qSCxrQH619Ejk4qgmLZPq5.Sf4K
real	0m0.256s
user	0m0.256s
sys	0m0.000s

- Cost: 13
$2y$13$3JCqbefwKyyzgR8.IdVGMudxy.7W4yghyFvtAzUDkKM2HowZe0b/W
real	0m0.512s
user	0m0.512s
sys	0m0.000s

- Cost: 14
$2y$14$Z46Ln93GFXIakqH1biIJ8.CR79GioDktj20zXjAj4en176nYh2rtC
real	0m1.018s
user	0m1.017s
sys	0m0.000s

- Cost: 15
$2y$15$RPJHiKStBqW8FvrvyJcXyOXuXJld8MI/NvRtM5aqn1ukFSQ0wfpDq
real	0m2.041s
user	0m2.034s
sys	0m0.004s

- Cost: 16
$2y$16$KD9fZnChvPywOBc0hdu8qOpWhlCr3m/FkHOvgrzgPQOztnN/w/txO
real	0m4.071s
user	0m4.068s
sys	0m0.000s

- Cost: 17
$2y$17$CFynrxJcrFM7XOH4bfyhgOiKQKwumiqNT2SMd5FmaeBDDqjrR6yA.
real	0m8.164s
user	0m8.158s
sys	0m0.000s

- Cost: 18
$2y$18$uEa4KQBi.wkMyNE4LYXjeOc.YFXFzq7wzyrxXXEImQG1c0DyVgO2u
real	0m16.285s
user	0m16.276s
sys	0m0.000s

- Cost: 19
$2y$19$shEBjel9XaQ.cPXPuoAS9ea.IBXJuAW837ZK4MPsuCEgr5XvK20fG
real	0m32.621s
user	0m32.595s
sys	0m0.008s

- Cost: 20
$2y$20$V7z8J4Cfuo5SUDyFJH8b8.l.4PR9pfuJbd/g63tQ/QJ8baIftnq.y
real	1m5.603s
user	1m5.561s
sys	0m0.004s

- Cost: 21
$2y$21$NZduXKF2kNxkaongvEz5i.wcAj4kus.5DmaAtYNGSbHMk0.azRgZ6
real	2m10.473s
user	2m10.455s
sys	0m0.004s

- Cost: 22
$2y$22$Im5UbasBJ/6KRNttVndLWu3x8JpxrQJ49vI0Z7YJnCWCvEavJValy
real	4m21.839s
user	4m21.831s
sys	0m0.004s

- Cost: 23
$2y$23$z1qQv6ZTEQ8dasK.EbmJdOM7SlanxgXpRanP.6m5.Vi9RZeMwEot6
real	8m42.773s
user	8m42.757s
sys	0m0.012s

- Cost: 24
$2y$24$0hhXeKintWYZZ/bNWYD6teGc112CxEmQ09z4OdIcpAycS6B410SRG
real	17m24.544s
user	17m24.504s
sys	0m0.032s

- Cost: 25
$2y$25$hsKNdUHOjyWsULyc4xN.5OsIup9VMP6qnitOCVkqXIqbu.0bayVpS
real	34m48.879s
user	34m48.789s
sys	0m0.072s

- Cost: 26
$2y$26$LQm0cQe2zojp5gQM65lyieFYElDrP7YWPbHs1cJ2VNqDNzEpipEBi
real	68m30.850s
user	68m30.684s
sys	0m0.136s

- Cost: 27
$2y$27$e1q3A7jHpxH4B0TQT2KsFuNKG/GR57FhY9PDUm88wID.di4bSIBha
real	140m23.573s
user	140m22.341s
sys	0m0.561s

- Cost: 28
$2y$28$V.miHX07kpYLnjYhfLdU8uw0Y7NkTee9289wnwGZ5hZwmGJ2mMy.u
real	280m37.341s
user	280m36.200s
sys	0m0.720s

- Cost: 29
$2y$29$V.LYLzsFgpYlYXn2FExyv.O3KxhIN9pAL2R9PDJ6mpw8VaC2ruqJ.
real	560m6.993s
user	559m58.479s
sys	0m2.988s

- Cost: 30
$2y$30$dOWc47CsjYLHsconSo9Yxekc7BwI8C1/D5bMGwxnJ9Wp0ikouUMA.
real	1112m24.634s
user	1111m55.195s
sys	0m14.688s

- Cost: 31
$2y$31$e5QhU4UPYQB28iFvEFrNr.wk7/ApOepFcEQ/2eBRhFX0M/QP6P0Ze
real	2248m36.388s
user	2245m57.611s
sys	2m22.707s