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arXiv · 2510.22078

Some 2-adic integers related to the odd part of 2^e!

Donald M. Davis
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Abstract

The odd part of 2^e! as e approaches infinity leads to a 2-adic integer z. The bits of z were publicized in OEIS-A359349, where two conjectures were made, relevant to computing z. We prove both of those conjectures. A second 2-adic integer, the limit of ((2^e-1)!!-1)/2^e, plays a key role in one proof.

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Donald M. Davis. 2025-10-24. Some 2-adic integers related to the odd part of 2^e!. https://arxiv.org/abs/2510.22078

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