Research NewsMathematics

New Test Sizes Up Randomness

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Science  25 Apr 1997:
Vol. 276, Issue 5312, pp. 532
DOI: 10.1126/science.276.5312.532

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Summary

A new mathematical test of randomness has shown that the sequence of digits in some irrational numbers is far less random than expected. The technique could shake up other fields as well, such as cryptography, where the randomness test could be used to crack encoded messages.