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-   -   Largest k*2^n-1 Primes Found In 2015 (https://www.mersenneforum.org/showthread.php?t=20808)

Kosmaj 2016-01-01 13:45

Largest k*2^n-1 Primes Found In 2015
 
Here is the list of 100 largest "Riesel" primes (k*2^n-1, k>1) found in 2015.

Meaning of rank marks:
r1, rank on this list
r2, rank on the list of all known primes (as of January 1, 2016 at 0200 GMT)

[CODE]
----------------------------------------------------------
r1 r2 description digits who
----------------------------------------------------------
1 12 3*2^11895718-1 3580969 L4159
2 13 3*2^11731850-1 3531640 L4103
3 36 1583*2^5989282-1 1802957 L4036
4 75 17*2^4107544-1 1236496 L4113
5 79 1993191*2^3986382-1 1200027 L3532
6 141 57*2^3339932-1 1005422 L3519
7 166 2751*2^3206569-1 965277 L4036
8 181 19401*2^3086450-1 929119 L541
9 212 5903*2^2938744-1 884654 L4036
10 278 7335*2^2689080-1 809498 L4036
11 321 65*2^2583720-1 777780 L2484
12 325 61*2^2580689-1 776867 L2484
13 373 99*2^2455541-1 739194 L1862
14 438 7913*2^2275664-1 685048 L4036
15 448 39*2^2251104-1 677652 L177
16 459 5055*2^2242777-1 675147 L4036
17 492 45*2^2205977-1 664067 L1862
18 526 315*2^2179612-1 656132 L2235
19 527 1423*2^2179023-1 655955 L3887
20 529 1423*2^2178363-1 655756 L3887
21 580 307*2^2137553-1 643471 L2235
22 587 319*2^2130729-1 641416 L1817
23 620 1246461300659*2^2103424-1 633206 L2484
24 667 99*2^2070908-1 623408 L1862
25 719 325*2^2024035-1 609298 L4076
26 751 249*2^2001627-1 602553 L1862
27 772 1455*2^1988795-1 598691 L1134
28 831 149*2^1945668-1 585707 L3967
29 856 2135489665061*2^1929362-1 580809 L2484
30 867 1187*2^1918188-1 577436 L1828
31 868 1071*2^1917749-1 577304 L1828
32 873 1065*2^1916200-1 576837 L1828
33 885 263*2^1904406-1 573286 L2484
34 894 3945*2^1894329-1 570254 L4036
35 895 4157*2^1892772-1 569785 L1959
36 916 283*2^1879051-1 565654 L2484
37 928 4125*2^1874718-1 564350 L1959
38 933 4039*2^1872875-1 563796 L1959
39 951 281*2^1860862-1 560178 L2484
40 953 231*2^1860743-1 560142 L1862
41 958 1455*2^1858634-1 559508 L1134
42 965 435*2^1853363-1 557921 L4036
43 991 4167*2^1836466-1 552835 L1959
44 1012 4029*2^1824569-1 549254 L1959
45 1017 4005*2^1823819-1 549028 L1959
46 1032 4065*2^1817502-1 547127 L1959
47 1036 4101*2^1816007-1 546677 L1959
48 1056 4039*2^1805627-1 543552 L1959
49 1069 4009*2^1799073-1 541579 L1959
50 1075 197*2^1796284-1 540738 L1862
51 1076 4137*2^1796226-1 540722 L1959
52 1079 4119*2^1794544-1 540216 L1959
53 1091 4125*2^1788660-1 538444 L1959
54 1116 31521*2^1778899-1 535507 L3519
55 1127 4053*2^1773028-1 533739 L1959
56 1137 4045*2^1765913-1 531597 L1959
57 1147 255*2^1763221-1 530785 L2484
58 1234 4065*2^1727864-1 520143 L1959
59 1238 4129*2^1727119-1 519919 L1959
60 1242 4179*2^1725552-1 519447 L1959
61 1245 4157*2^1724202-1 519041 L1959
62 1254 4071*2^1721361-1 518185 L1959
63 1264 4179*2^1716052-1 516587 L1959
64 1298 4149*2^1701565-1 512226 L1959
65 1303 2444379546449*2^1699964-1 511753 L2484
66 1306 4133*2^1699380-1 511568 L1959
67 1314 4023*2^1695443-1 510383 L1959
68 1324 4135*2^1689399-1 508564 L1959
69 1355 4115*2^1676476-1 504674 L1959
70 1359 4175*2^1674484-1 504074 L1959
71 1368 229*2^1670843-1 502977 L1862
72 1377 4101*2^1667313-1 501915 L1959
73 1397 6213*2^1655136-1 498250 L4036
74 1429 1695*2^1645579-1 495372 L527
75 1438 4067*2^1639338-1 493494 L1959
76 1443 4005*2^1638053-1 493107 L1959
77 1463 2115*2^1631867-1 491245 L1862
78 1464 4103*2^1629508-1 490535 L1959
79 1472 2115*2^1626565-1 489649 L1862
80 1483 3147*2^1620488-1 487819 L4036
81 1490 4041*2^1617699-1 486980 L1959
82 1500 231*2^1612617-1 485449 L1862
83 1524 4011*2^1599078-1 481375 L1959
84 1579 4009*2^1582889-1 476501 L1959
85 1600 4065*2^1576362-1 474536 L1959
86 1613 4067*2^1570800-1 472862 L1959
87 1648 4053*2^1550167-1 466651 L1959
88 1656 4113*2^1547054-1 465714 L1959
89 1657 4101*2^1546943-1 465680 L1959
90 1662 4053*2^1545380-1 465210 L1959
91 1687 4039*2^1534551-1 461950 L1959
92 1691 2445*2^1532647-1 461377 L1862
93 1698 1455*2^1529868-1 460540 L1134
94 1729 4047*2^1514401-1 455884 L1959
95 1739 4125*2^1510620-1 454746 L1959
96 1742 4159*2^1509203-1 454319 L1959
97 1744 405*2^1508592-1 454135 L1862
98 1759 4163*2^1500990-1 451847 L1959
99 1866 2175*2^1466621-1 441501 L1862
100 1870 8413*2^1464751-1 440938 L4113
----------------------------------------------------------
[/CODE]

The list of 100 largest Riesel primes found in 2014 can be found [URL="http://mersenneforum.org/showthread.php?t=19944"]here[/URL].


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