| 11. | It is neither a prime number nor a composite number.
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| 12. | Thus it appears that besides 2 and 5, all untouchable numbers are composite numbers.
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| 13. | Deterministic algorithms do not erroneously report composite numbers as prime.
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| 14. | However, it is the only composite number " n " for which is false.
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| 15. | Highly-composite numbers tend to be easily represented in "'primary "'notation.
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| 16. | It means that 1, 4, and 36 are the only square highly composite numbers.
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| 17. | The Trend Weight combines short, intermediate and long-term trend signals into a single composite number.
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| 18. | Additional structure may be seen when composite numbers are also included in the Ulam spiral.
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| 19. | No composite number below 2 64 ( approximately 1.845?0 19 ) passes the Baillie-PSW test.
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| 20. | Therefore, computing the Kempner function can in general be no easier than factoring composite numbers.
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