December 7, 2016

Found a brainteaser – decrypt this

Found this today. Actually got me thinking, and now its bugging me.

You have a 23 digit number, that correlates to a 4 digit key.
Whats the Algorithm used here?

Known Hashes w/ Key
98061460820622079997412
Key 4718

98061460820622089997410
Key 0446

98061460820622099997418
Key 2017

98061460820622109997416
Key7534

98061460820619129997418
Key 0760

98061460820619259997410
Key 5676

Test – find key for these 3
98061460820619359997419
98061460820619889997418
98061460820619979997419

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