Electronic Proceedings of the Twentysecond Annual International Conference on Technology in Collegiate MathematicsChicago, Illinois, March 1114, 2010Paper C025
This is an electronic reprint, reproduced by permission of Pearson Education Inc. Originally appeared in the Proceedings of the Twentysecond Annual International Conference on Technology in Collegiate Mathematics, ISBN 9780321746146, Copyright (C) 2011 by Pearson Education, Inc. 
The Role Played by the TI89 CAS in Resolving Divisibility Questions 
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Tests for the divisibility of an integer by 3, 5, 7, and 11 are well
known. We focus on the role played by CAS technology in
resolving integer divisibility by other primes including 37, 41, 73,
and 101. In addition, the CAS together with modular arithmetic
are employed to secure prime divisors in the sequence 11, 101,
1001, 10001... first studied in 1854
Keyword(s): number theory, computer algebra systems, TI89