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2011-06-21, 19:55
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#232 |
Oct 2006
22·5·13 Posts |
Part 2:
Code:
12500 26208615 12501 34531851 12502 254068527 12503 55382025 12504 92237043 12505 28748145 12506 54455457 12507 131373321 12508 59029497 12509 50916375 12510 67153497 12511 31897725 12512 133003737 12513 63210681 12514 44877345 12515 430521 12516 92853945 12517 59205351 12518 71384853 12519 41514435 12520 31328625 12521 75927765 12522 84022773 12523 4293669 12524 35952447 12525 90588879 12526 136568157 12527 38310549 12528 34740645 12529 58229325 12530 53220237 12531 485349 12532 61627383 12533 36106545 12534 68245965 12535 89512179 12536 73318455 12537 9193551 12538 124723893 12539 38319519 12540 75950703 12541 49528515 12542 31214313 12543 366544239 12544 95075553 12545 86999679 12546 53035887 12547 83817201 12548 78979197 12549 9171741 12550 46932003 12551 155818809 12552 131066355 12553 36157605 12554 31456503 12555 128707539 12556 71849433 12557 45758811 12558 116343573 12559 55645305 12560 1081737 12561 47835531 12562 9009387 12563 115529271 12564 7933443 12565 9635961 12566 8061777 12567 16295085 12568 42399183 12569 52443369 12570 13501233 12571 275710059 12572 17268063 12573 33120549 12574 7432497 12575 169274811 12576 346316787 12577 6567441 12578 8033985 12579 38281155 12580 60882165 12581 21576339 12582 128098467 12583 9874515 12584 59347743 12585 81434841 12586 9439995 12587 46987749 12588 127490487 12589 20966505 12590 44177223 12591 90781815 12592 54057975 12593 3885795 12594 82894593 12595 79256241 12596 58312815 12597 7860381 12598 88721205 12599 8889075 12600 6500673 12601 28486095 12602 162063933 12603 139755189 12604 269106315 12605 17481549 12606 245606613 12607 10041981 12608 29052675 12609 133248339 12610 77673273 12611 28309329 12612 47810157 12613 19190361 12614 21383355 12615 92046099 12616 64850427 12617 125329275 12618 16476807 12619 14666121 12620 34339767 12621 32730135 12622 11058195 12623 2609949 12624 8227377 12625 69966219 12626 18070587 12627 3281421 12628 56965347 12629 20202585 12630 96583197 12631 591435 12632 7174947 12633 48465351 12634 55131027 12635 15033915 12636 4409127 12637 69862989 12638 73392045 12639 240965919 12640 43867965 12641 11988591 12642 327335883 12643 68428905 12644 22233963 12645 177732009 12646 20008143 12647 47690889 12648 221332857 12649 48630519 12650 241367223 12651 28121655 12652 44210655 12653 10272945 12654 9036885 12655 85811145 12656 56625723 12657 45077961 12658 160404225 12659 32716365 12660 17296545 12661 2689455 12662 11058783 12663 7590231 12664 5982795 12665 13937979 12666 72157263 12667 623841 12668 604635 12669 30681735 12670 184456893 12671 8094111 12672 17189805 12673 43521129 12674 75846687 12675 4701141 12676 66725085 12677 134552925 12678 38392125 12679 51270585 12680 257289483 12681 156478695 12682 211011495 12683 20781351 12684 29962173 12685 100969455 12686 14505525 12687 6412485 12688 32701053 12689 105582459 12690 78568635 12691 12434409 12692 4135575 12693 6723495 12694 15010275 12695 8885661 12696 76307103 12697 6283761 12698 32011143 12699 27782781 12700 1483203 12701 163579875 12702 42413025 12703 13852341 12704 44617965 12705 3501099 12706 359781183 12707 204703299 12708 216331395 12709 15736695 12710 52439253 12711 39301119 12712 5309817 12713 60473865 12714 11975565 12715 23591181 12716 78669423 12717 163070301 12718 155447523 12719 122309061 12720 54616005 12721 154433979 12722 2119167 12723 77561025 12724 19458087 12725 6786615 12726 63633315 12727 34320951 12728 81317775 12729 57856965 12730 154061985 12731 25282851 12732 105701295 12733 16701531 12734 9051417 12735 212445315 12736 25050087 12737 191935509 12738 111781455 12739 24318915 12740 116168643 12741 59008281 12742 35285853 12743 54235929 12744 1307325 12745 12062211 12746 67159155 12747 39105141 12748 5391015 12749 43878999 12750 3081243 12751 14937075 12752 348848787 12753 35551491 12754 23101713 12755 59208321 12756 162222123 12757 111544431 12758 134033595 12759 18652965 12760 33644757 12761 105413169 12762 21809013 12763 1600725 12764 4996863 12765 21610551 12766 130170087 12767 10100931 12768 31473627 12769 175276491 12770 5433057 12771 18123459 12772 106204113 12773 15000219 12774 73711635 12775 14220159 12776 10730397 12777 36970155 12778 117731355 12779 182435085 12780 50223255 12781 9061269 12782 136129515 12783 45236685 12784 129750273 12785 61496655 12786 38617005 12787 58648875 12788 70333287 12789 38344731 12790 38540817 12791 21826869 12792 52720155 12793 14532435 12794 28971495 12795 52181895 12796 36191175 12797 101305035 12798 126225417 12799 131962935 12800 67459035 12801 32456931 12802 61222275 12803 11999655 12804 3183267 12805 316455 12806 137061543 12807 64613685 12808 11716677 12809 10513041 12810 92246073 12811 43493991 12812 18018297 12813 86871015 12814 171685305 12815 5158035 12816 136924263 12817 12094929 12818 57032493 12819 163826649 12820 17623887 12821 14335131 12822 19676037 12823 82711641 12824 116542623 12825 2814081 12826 53631915 12827 40614339 12828 125382435 12829 176680071 12830 3982737 12831 14005089 12832 100036893 12833 51233619 12834 173926263 12835 49549071 12836 84119157 12837 7650045 12838 10356747 12839 15187635 12840 40028895 12841 54859761 12842 53586303 12843 117608001 12844 25771233 12845 16647651 12846 19720407 12847 79537689 12848 45601125 12849 85472595 12850 6802353 12851 57449049 12852 63134223 12853 1527525 12854 41695893 12855 150599589 12856 737037 12857 13004361 12858 12097803 12859 331166529 12860 127549143 12861 88092315 12862 62475723 12863 10119879 12864 72424545 12865 2332755 12866 29285367 12867 5462499 12868 157454295 12869 48224235 12870 2252463 12871 37257099 12872 178399833 12873 1240575 12874 34251957 12875 41759259 12876 4412583 12877 4121991 12878 37483785 12879 37505739 12880 8739045 12881 2460735 12882 52186113 12883 97203195 12884 153400983 12885 84962559 12886 50352777 12887 26814735 12888 66856155 12889 27551019 12890 4041033 12891 38193705 12892 26137665 12893 58218105 12894 3140517 12895 15822441 12896 32194977 12897 17900739 12898 68696223 12899 60627189 12900 150574125 12901 185248449 12902 2704395 12903 24311961 12904 59337285 12905 10164099 12906 5107347 12907 20065215 12908 21356373 12909 47195769 12910 116093175 12911 288163791 12912 59691573 12913 34558329 12914 31622625 12915 26582349 12916 59067813 12917 262702485 12918 14823753 12919 25074285 12920 1957437 12921 22001451 12922 599775 12923 20047755 12924 40402113 12925 106291599 12926 3428655 12927 10617525 12928 21107295 12929 15006195 12930 187090473 12931 60506685 12932 35883795 12933 12955695 12934 69586425 12935 63563451 12936 92054037 12937 20458779 12938 42286623 12939 32877735 12940 36698193 12941 192723069 12942 11821113 12943 24452829 12944 9401595 12945 7506921 12946 131146023 12947 37418265 12948 4291947 12949 7012629 12950 71831325 12951 4784409 12952 27262605 12953 47015025 12954 9898845 12955 52520001 12956 16014447 12957 183929601 12958 48837297 12959 16994121 12960 74954955 12961 12252891 12962 55353357 12963 9485145 12964 40421967 12965 195923175 12966 36528495 12967 50267481 12968 74539125 12969 19929009 12970 240260643 12971 156631209 12972 2778183 12973 25792005 12974 52013373 12975 2486985 12976 37646055 12977 16880661 12978 62178543 12979 49970481 12980 104945205 12981 33333675 12982 117841695 12983 146510001 12984 90007857 12985 40285545 12986 20130267 12987 95511981 12988 12854613 12989 417880719 12990 139840545 12991 4869201 12992 4380363 12993 13607541 12994 53088435 12995 6417891 12996 34661883 12997 222050571 12998 208540863 12999 36785331 A short history of twins found per pass: pass 1->10: 0-1M, 1-5M, 5-10M, 10-25M, 25-50M, 50-100M, 100-200M, 200-300M, 300-400M, 400-500M. Code:
n= 10-11k 11-12k 12-13k 13-14k 1 30 17 16 10 2 88 72 80 71 3 117 94 80 67 4 230 229 182 144 5 244 239 225 205 6 181 200 238 284 7 100 128 140 8 8 20 32 9 2 1 6 10 0 0 1 (13-14k still unfinished) 10-11k: 1611.4 CPU hours 11-12k: 2523.9 CPU hours 12-13k: 3111.0 CPU hours CPU is a quadcore 2.9GHz, don't know what chip specifically. 13000<n<14000 k<1e8 done 13000<n<14000 1e8<k<2e8 44.9% done total: 84.7% done. 14000<n<15000 k<2.5e7 done 14000<n<15000 2.5e7<k<5e7 20% done total: 31.3% done. Last fiddled with by roger on 2011-06-21 at 19:57 |
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2011-06-22, 08:03
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#233 |
Mar 2006
Germany
2×1,481 Posts |
Thanks for more data, I try to update my page the next days.
I forgot to say this last time: It's easier to put your list in a file and attach it here. Easier to read the post (and more to reply on it) and easier for me to handle such list (download). |
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2011-08-07, 00:14
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#234 |
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Oct 2006
22·5·13 Posts |
More:
13000<n<14000 done (see attached file) 14000<n<15000 k<5e7 done 14000<n<15000 k<1e8 22% done total 52.1% done 15000<n<16000 k<1e7 done 15000<n<16000 k<2.5e7 53% done total 20.7% done |
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2011-08-09, 17:03
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#235 |
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Mar 2006
Germany
2×1,481 Posts |
I've inserted all 12000 ≤ n ≤ 14000 in my page for smallest k-values as twins of k*2^n-1.
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2011-10-16, 08:11
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#236 |
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Oct 2006
10416 Posts |
update:
14000<n<15000 k<1e8 done 14000<n<15000 1e8<k<2e8 79% done total: 84.7% done. 15000<n<16000 k<5e7 done total: 43.5% done. 16000<n<17000 k<1e7 done 16000<n<17000 1e7<k<2.5e7 45% done total: 15.6% done. total twins found: 15553 % to n=15000: 98.98% % to n=20000: 77.33% % to n=25000: 61.97% % to n=30000: 51.69% |
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2011-10-17, 23:15
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#237 |
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Jul 2011
32×13 Posts |
Accidental twins
Today I found a set of twins by accident.
28,000,000,000,079 28,000,000,000,081 Probably not earth-shattering in terms of size, but what luck playing around with a prime calculator on the web. 
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2011-11-27, 08:35
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#238 |
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Oct 2006
22×5×13 Posts |
14k<n<15k done (file attached)
time taken (cpu hrs): 5781.7 15000<n<16000 k<5e7 done. 15000<n<16000 5e7<k<1e8 54% done total: 55% done. 16000<n<17000 k<1e7 done. 16000<n<17000 1e7<k<5e7 81% done total: 21.3% done. |
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2012-04-10, 21:14
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#239 |
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Oct 2006
22·5·13 Posts |
Small update (been running this project on the back burner)
15000<n<16000 k>2e8 done. 15000<n<16000 2e8<k<3e8 90% done total: 95.9% done. also: 3124593081*2^83047+-1 is prime (5th largest on my chart so far) |
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2012-04-24, 21:46
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#240 |
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Oct 2006
22·5·13 Posts |
15000<n<16000 done:
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2012-04-25, 16:00
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#241 |
Jan 2007
Germany
7458 Posts |
Congratulation !
124121439*2^15541+d ; d=-5,-1,+1 is a 4679 digit triplet ! Place 7. Best |
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2012-04-26, 06:28
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#242 |
Aug 2010
10100111002 Posts |
Look what I found a short while ago:
84966861*2^140219-1 is prime! Time : 33.905 sec. 84966861*2^140219+1 is prime! Time : 34.592 sec. This enters the Prime Pages as the 10th largest known twin: http://primes.utm.edu/top20/page.php?id=1 http://primes.utm.edu/primes/page.php?id=106537 http://primes.utm.edu/primes/page.php?id=106538 This project deserves (and got) some credit since it gave me the idea to search a low k, variable-n range. In the end, it paid off
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