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In mathematics an even integer, that is, a number that is divisible by 2, is called evenly even or doubly even if it is a multiple of 4, and oddly even or singly even if it is not. The former names are traditional ones, derived from ancient Greek mathematics ; the latter have become common in recent decades.
Starting with W 4 = 63 and W 5 = 159, every sixth Woodall number is divisible by 3; thus, in order for W n to be prime, the index n cannot be congruent to 4 or 5 (modulo 6). Also, for a positive integer m, the Woodall number W 2 m may be prime only if 2 m + m is prime.
That is, software which can be freely used, copied, studied, modified, and redistributed by everyone that obtains a copy. Typically, this means software which is distributed with a free software license, and whose source code is available to anyone who receives a copy of the software. Free and open-source software portal
Spoilers ahead! We've warned you. We mean it. Read no further until you really want some clues or you've completely given up and want the answers ASAP. Get ready for all of today's NYT ...
With that, it’s worth it for any adult to better understand how sundowning presents, and what it might mean for the cognitive health of your loved one. We tapped two health care providers who ...
Size of the senior population that frequently reports mental health as “not good”: We looked at the percentage of seniors who report 14 or more poor mental health days each month, which likely ...
Free and open-source software portal; As follows from its parents, this category is for PDF readers/viewers that are free software — distributed with their source code and under a free software license.
The first version of Sumatra PDF, designated version 0.1, was based on Xpdf 0.2 and was released on 1 June 2006. It switched to Poppler from version 0.2. In version 0.4, it changed to MuPDF for more speed [4] and better support for the Windows platform. Poppler remained as alternative engine for a time, and from version 0.6 to 0.8 it was ...