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Timeline for Calculate Euler's totient function

Current License: CC BY-SA 3.0

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Jun 17, 2020 at 9:04 history edited CommunityBot
Commonmark migration
Jun 22, 2016 at 9:52 history edited Leaky Nun CC BY-SA 3.0
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Jun 22, 2016 at 9:50 comment added Martin Ender Well they do backtrack as long as you don't leave them. As long as the engine is inside the lookaround it will try everything possible to make that lookaround match (or fail in the case of a negative lookaround). But once the lookaround is passed, the engine will not backtrack into it if anything after it fails (unless it then also starts to backtrack things in front of the lookaround and has to reevaluate everything anyway).
Jun 22, 2016 at 9:48 comment added Leaky Nun Then how is it that the regex tested every divisor?
Jun 22, 2016 at 9:48 comment added Martin Ender Lookarounds don't backtrack in general.
Jun 22, 2016 at 9:47 comment added Leaky Nun Lookbehind does not backtrack unless inside a lookahead?
Jun 22, 2016 at 9:30 history answered Leaky Nun CC BY-SA 3.0