Problem
Provide a J phrase to determine all the times whose display on a 24-hour clock is a prime number.
Constraints
The usual metrics apply: brevity, novelty, velocity and parsimony.
Spoiler Alert! |
Solutions
No. |
Phrase |
#@;: |
# |
100&(6!:2) |
(7!:2) |
Notes |
Author/Sig |
0 |
1 1j1 1 1#!.':'"1'r<0>2.'8!:2(#~1 p:100#.])(#:,@i.)24 60 |
26 |
56 |
0.000338163 |
44608 |
HH:MM |
-- DanBron 2007-11-29 21:13:47 |
1 |
1 1j1 1 1j1 1 1#!.':'"1'r<0>2.'8!:2(#~1 p:100#.])(#:,@i.)24 60 60 |
26 |
65 |
0.0262146 |
2625728 |
HH:MM:SS |
-- DanBron 2007-11-29 21:13:47 |
2 |
}:"1'q(:)r(0)3.'8!:2(#~1 p:100&#.)>,{i.&.>24 60 |
23 |
47 |
|
|
|
-- BJonas 2007-12-04 08:28:41 |
3 |
}:"1'q(:)r(0)3.'8!:2(#~1 p:100&#.)>,{i.&.>24 60 60 |
23 |
50 |
|
|
with seconds |
-- BJonas 2007-12-04 08:55:26 |
4 |
,&.:(':'&,"1)"2]2 2$"1}.@":@>1e4+(#~1&p:)100#.>,{i.&.>24 60 |
39 |
59 |
|
|
|
-- BJonas 2007-12-04 09:16:01 |
5 |
,&.:(':'&,"2)"3":@>10 10#:(#~1 p:100&#.)>,{i.&.>24 60 |
32 |
53 |
|
|
|
-- BJonas 2007-12-04 09:22:27 |
|
,.(#~1&p:*.60>100&|)i.2400 |
16 |
26 |
1.8e_4 |
38848 |
Just the numbers |
-- Raul Miller 2007-12-21 22:11:36 |
Notes
Changed table header from "Verb" to "Phrase". -- BJonas 2007-12-04 08:28:41