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Surprised this isn’t a better known / prevented vector. I remember experimenting with variant IPs like this in IE6 over 20 years ago.
Checking now with Firefox and it auto-translates on the line below as I type one in. (Tried both 0x7f000001 and 2130706433 because they’re both variants of 127.0.0.1, and if there’s something bad running on that address you have other problems.)
Irrelevant nerd fact: 2130706433 is a prime number.
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I just plugged factor(2130706433); into Maxima and it says that it has no factors. Pretty sure that it’s prime.
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