PI Pn+1 509, 521, 571, PI Pn-1 509, 521


 Subject: New factorizations
    Date: Fri, 06 Nov 1998 16:49:06 +0100
    From: Lorenzo Allegrucci <parsek@box1.tin.it>
      To: kc2h-msm@asahi-net.or.jp


Here's five full factorizations (modulo probable primes :-) of some
products of Pn +/- 1.
Please check them for errors. The numbers are in the standard notation.
Hope I have not "rediscovered" these factors!
Currently I'm working on products of Pn +/- 1 above 500.
Let me know.



509#+1 = 1283.2346607889.238824724169.44454502963793161464218458348743529681571852166989194127604677976442420838835166637554026741081382357781177604053399621677349023128862572758773385459721128988658559425153672190907294298877

509#-1 = 593759939.4893826436623.11000255470631186647845472924605460623263720963121227259268263872191097090171102571132566853405212249640916455517577389583885724177534202876635164756225873715796610337376047991577000409892657

521#+1 = 3373.3793.447481.173766523691.16740177285352542520416709230009284243751013382674856414804666764429458106653942889707236545172184102095173870607140269478370943695826430625263817081242027243705422384108623630284235194654649

521#-1 = 3666321961.35806575047.126854701421415423005722221258913923293159222203492610698334841539835196684373491147518873602321681864863267650007849966793767819786891771387858321107220130411597303756242483224394480318610098387

571#+1 = 1291798623217.203284084101877025011613621745075461311337925656227150615733669420292492048702444161194013419856708448299268536578319279538922283289275318704708595532374485587070514223057691369802753852488500642289131005227253654853887263



Lorenzo Allegrucci
parsek@tin.it

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E-mail : kc2h-msm@asahi-net.or.jp
Hisanori Mishima