mersenneforum.org Some recommended sequences
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 2009-03-20, 08:17 #1 schickel     "Frank <^>" Dec 2004 CDP Janesville 212210 Posts Some recommended sequences Here are some recommendations for sequences to take up: Code: 154548 696. 2^4 * 3 c104 sz 111 553014 1111. 2^2 * 3 c96 sz 108 Obviously, the ones with the larger "cxx" values will probably decrease in value after factorization (but not if the guide is an abundant number). Black guide sequences will usually be better than blue guide sequences. Check here for a listing of the longest sequences. Please remember to check the reservation thread in case someone reserves one of these.... WARNING: We're beginning to run out of immediately stable sequences, so be prepared for the sequences to rise a few digits before getting rid of the 3 (or whatever). Last fiddled with by TimSorbet on 2009-10-05 at 14:23 Reason: adding one
 2009-07-11, 20:31 #2 jrk     May 2008 44716 Posts taking 214120
 2009-07-19, 20:01 #3 Batalov     "Serge" Mar 2008 Phi(4,2^7658614+1)/2 22×5×503 Posts taking 218292
 2009-07-20, 22:17 #4 Batalov     "Serge" Mar 2008 Phi(4,2^7658614+1)/2 235148 Posts taking 216810 from 666.
 2009-07-21, 00:15 #5 fivemack (loop (#_fork))     Feb 2006 Cambridge, England 11001001101102 Posts taking 217362 (recomputed from step 1 to 721 already ... clear bug in the factorization.ath.cx record)
 2009-07-21, 01:26 #6 Batalov     "Serge" Mar 2008 Phi(4,2^7658614+1)/2 22×5×503 Posts You can start from WolfCrey's end-of-file lines: Code:  1383 . 286820322483281615172110136633016906678666715814632942805882483965982948460458740764549167008273412 = 2^2 * 3 * 13 * 558737891 * 3290615940686698056645281154083612633961644236751479874931132316579515819791893431198397 1384 . 433907668636424405035198409008745019940297594386383608128299766203593456795761629694535286452156860 = 2^2 * 3 * 5 * 31 * 11783 * 20539481 * 23921629 * 1039433693 * 38766045164216654243013616543092244056647948841103025216675526529321 1385 . 820332014449784109079496038584617331966213166811665664451600510600923443457791742514088151505045060 = 2^2 * 3 * 5 * 42864122819923627 * 2803162728062777020861 * 113787920253321211102040485795299530070124154204239849374433
 2009-07-21, 14:55 #7 fivemack (loop (#_fork))     Feb 2006 Cambridge, England 2×7×461 Posts Let's do 122892 too (I'm assuming the factorization.ath.cx page is right for this one) 10metreh: It looks good, give it a go! Last fiddled with by 10metreh on 2009-07-21 at 15:03
 2009-07-25, 10:00 #8 gd_barnes     "Gary" May 2007 Overland Park, KS 52·11·43 Posts Reserving 153090

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