Trying to find patterns in numbers is one of the greatest challenges in mathematics. Some researchers make it their primary area of investigation, perhaps with entire projects devoted to developing algorithms for the task. The Journal of Integer Sequences is a collection of papers written by people such as these, whose work focuses on this or a related topic. Readers will find detailed discussions of factorization methods, proofs, and theories in the published papers. Mathematicians can submit their original papers for possible inclusion in the journal. Issues dating back to 1998 can be viewed online.