prime.or

; Prints either 'Prime' or the smallest prime divisor of the argument
0 0 l
1 0 0
2 0 254
3 0 255
4 0 #
; (255,254) holds our 'running total'
5 0 0
6 0 254
7 0 254
; (254,254) holds our index into the argument
8 0 0
9 0 ?
10 0 cw
; This is the entry point, when we return to the 'loop'.
11 0 254
12 0 255
13 0 =
14 0 10
15 0 *
; Multiply old total by 10
16 0 255
17 0 254
18 0 254
19 0 =
20 0 =
21 0 '0
22 0 -
23 0 +
; add the converted character from index
24 0 254
25 0 255
26 0 #
27 0 cw
27 1 cw
; store it
26 1 254
25 1 254
24 1 =
23 1 1
22 1 +
21 1 @
; This duplicate is for below, where we check for nul
20 1 254
19 1 254
18 1 #
; increment index
17 1 255
16 1 ~
15 1 =
14 1 nop
13 1 nop
12 1 nop
11 1 ?
10 1 cw
; if index points to nul, go to where to prime part 
; else loop
9 1 ccw
9 2 2
9 3 254
9 4 254
9 5 #
; n
; Store initial divisor of 2
9 6 254
9 7 255
9 8 =
9 9 0
9 10 ?
9 11 ccw
; Re-entry point for loop
; Get number on stack
9 12 @
; n n
9 13 254
9 14 254
9 15 =
9 16 -
9 17 !
9 18 ?
9 19 cw
; If divisor and number are equal, print 'Prime'
8 19 0
7 19 'e
6 19 'm
5 19 'i
4 19 'r
3 19 'P
2 19 s
1 19 0
0 19 c
255 19 0
254 19 ret
; else test division
9 20 @
; n n
9 21 254
9 22 254
9 23 =
; n n d
9 24 ccw
10 24 ccw
10 23 %
10 22 !
10 21 ?
10 20 cw
; If mod == 0, that's a factor
11 20 254
12 20 254
13 20 =
14 20 d
15 20 0
16 20 c
17 20 0
18 20 ret
; else increment divisor
; n
10 19 254
10 18 254
10 17 =
10 16 1
10 15 +
10 14 254
10 13 254
10 12 #
; and loop
10 11 ccw
; MIT License
;
; Copyright (c) 1994, 2016 Jeff Epler
;
; Permission is hereby granted, free of charge, to any person obtaining a copy
; of this software and associated documentation files (the "Software"), to deal
; in the Software without restriction, including without limitation the rights
; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
; copies of the Software, and to permit persons to whom the Software is
; furnished to do so, subject to the following conditions:
;
; The above copyright notice and this permission notice shall be included in all
; copies or substantial portions of the Software.
;
; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
; SOFTWARE.