RegEx - Useful Patterns

Description	RegEx Pattern	Sample Data & Result
Search for all numbers except ones prefixed with #	(?<!\#)\b\d{5,}\b	1234567-JUL13 Ck #1234567 145A1 12345 05/14.

Here is a good online tester: http://regexr.com

Quick Cheat Sheet: http://www.rexegg.com/regex-quickstart.html#quantifiers