mersenneforum.org > Math Why is that Factor not listed ?
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 2017-01-12, 08:38 #1 Kalli Hofmann     "Karl-Heinz Hofmann" Jan 2017 Gr.-Rohrheim Germany 23 Posts Why is that Factor not listed ? On the page : http://www.mersenne.ca/exponent.php?exponentdetails=47 only two factors are listed. But M47 is fully factored. The factor 13264529 is missing for completness. Why is it not listed ? Greetings from Germany ..... Kalli
 2017-01-12, 15:55 #2 Batalov     "Serge" Mar 2008 Phi(4,2^7658614+1)/2 100011101001012 Posts For most "completely factored" * numbers listed on that page, last factor (a.k.a. "cofactor") is by convention not shown (because it would take pages to show, except for very small entries): E.g. if M... = a * b * c * cofactor then a, b and c prime factors are listed, and for cofactor search for the line Remaining cofactor is a probable-prime Furthermore, in the "Composite Factors" section, only combinations a*b, a*c, b*c will be shown but not "a*cofactor". "It is a feature, not a bug", as they say. _______________ * there is controversy about the use of this term :-) hence it is in quotes.
 2017-01-13, 08:18 #3 Kalli Hofmann     "Karl-Heinz Hofmann" Jan 2017 Gr.-Rohrheim Germany 23 Posts Thank you BATALOV Indeed, those Factors can be very big ...... But M47 has only three factors, and the last Factor seems not too big for me. (13264529). What a pity In Germany we say: "es es, wie es es" ... in english : "it is, how it is" Thank you ........................ Kalli
 2017-01-13, 08:37 #4 Kalli Hofmann     "Karl-Heinz Hofmann" Jan 2017 Gr.-Rohrheim Germany 23 Posts On this page: http://www.mersenne.ca/prp.php?show=...onent=1000#M47 The last Faktor is listed. Another Question: when look at the M59, you see PRP-13, as remaining cofactor. Is there a list, where you can see, how those PRPĀ“s look like ?
 2017-01-13, 08:59 #5 axn     Jun 2003 13·192 Posts

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