Regular Expressions 101

^start of line

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

Character Class[1-5]

1-5one character from 1 (49₁₀) to 5 (53₁₀)

\d{14}a digit, repeated exactly 14 times

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

^5[1-5]\d{14}$

New

5245123412347894
5645123412347894
5241123412347894
6245123412347894
12451234123478AA