mersenneforum.org - Riesel Primes k*2^n-1, k<300 [Was "k=1"]

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- - Riesel Primes k*2^n-1, k<300 [Was "k=1"] (https://www.mersenneforum.org/showthread.php?t=1767)

[QUOTE]christian(dot)hercher[/QUOTE]

is this your name? if so I'll had the info to the stats.

Joss

Joss, that was the name givien to me, from that person when joining. :wink:

Yes, that's me (Christian Hercher).

Cyrix

status on k=153, 155, 157, 159, 161

k=153, 155, 157, 159, and k=161 are tested up to n=250000 and I'm quitting them.

153*2^n-1 is prime for: n=3, 4, 6, 7, 10, 11, 12, 19, 20, 22, 23, 39, 66, 106, 120, 124, 151, 312, 411, 447, 474, 507, 574, 671, 787, 826, 979, 1690, 1954, 2047, 3003, 4323, 4426, 5903, 6267, 6846, 14550, 17470, 21520, 31711, 36724, 45291, 45654, 51778, 55420, 63439, 68451, 78423, 109696, 125128, 130710, 169836, 192900, 195028 [250000]

155*2^n-1 is prime for: n=2, 8, 14, 16, 44, 46, 82, 172, 196, 254, 556, 806, 2828, 4462, 5558, 8086, 8216, 9862, 12026, 12842, 26054, 57044, 85364, 105098, 127262 [250000]

157*2^n-1 is prime for: n=1, 5, 33, 97, 121, 125, 305, 445, 473, 513, 1581, 3077, 3517, 6345, 8797, 15265, 16641, 32185, 32581, 43905, 77025, 84377, 202345, 230777, 234401 [250000]

159*2^n-1 is prime for: n=1, 4, 5, 11, 24, 25, 41, 67, 185, 215, 235, 277, 445, 465, 647, 844, 1420, 1505, 2385, 6451, 7475, 9549, 10800, 11585, 16079, 47795, 51839, 89285, 106481, 186331, 201429 [250000]

161*2^n-1 is prime for: n=2, 6, 18, 22, 34, 54, 98, 122, 146, 222, 306, 422, 654, 682, 862, 1010, 1346, 1582, 7890, 9714, 12498, 21742, 27810, 34798, 74382, 97746, 205370, 249710 [250000]

-- Thomas L10

status of k=29, k=39, k=41 and k=113

k=29 has reached n=750000 now.

k=39 and k=41 are at n=475000 and 480000, respectively.

k=113 is currently at n=465000 and 113*2^464386-1 is prime! :w00t:

-- Thomas L10

Joss, the following is still missing in your list at [url]www.15k.org:[/url]

39*2^322613-1 is prime!

-- Thomas L10

[QUOTE=marc]Can I reserve 103?[/QUOTE]

marc you can start working on 103
I'll update the stats when I get home.

joss

Currently at n=241000. Only one new prime for n=206970.
Will work a little more on this one. It's the third k, after 77 and 79, with not a single prime in the 100-200k range. :surprised
Next I'd like to reserve k=89. BTW, the file for k=33 is misssing (broken link).

k=83 complete to 200000

k=83 is complete to 200000, & prime for 2, 4, 8, 10, 14, 18, 22, 24, 26, 28, 36, 42, 58, 64, 78, 158, 198, 206, 424, 550, 676, 904, 1276, 1374, 1642, 2124, 2796, 5266, 5318, 8828, 11638, 22968, 35836,53348, 55808, 79826, 105282, 112418, 129804, 144456.

I'm reserving k=33 to 200000.

Harvey563