Runaway Regular Expressions: Catastrophic Backtracking - https://www.regular-expressions.info/catastrophic.html
"1085632_1230848_1230849_582053_2831200_5524895_6004491&page=6".matches("^\\d+(_?\\d+)*$");
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July 13, 2018 06:27
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Catastrophic Backtracking
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